Regulation No. 98-01
|Name:||Regulation No. 98-01|
|Description:||Headlamps - Gas Discharge Lamp Units.|
|Official Title:||Uniform Provisions Concerning the Approval of: Motor Vehicle Headlamps Equipped with Gas Discharge Light Sources.|
|Country:||ECE - United Nations|
|Date of Issue:||2011-01-27|
|Amendment Level:||01 Series, Supplement 7|
|Number of Pages:||75|
|Vehicle Types:||Bus, Car, Component, Heavy Truck, Light Truck, Motorcycle|
|Subject Categories:||Lighting and Light Signalling Equipment|
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July 11, 2016
STATUS OF UNITED NATIONS REGULATION
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
MOTOR VEHICLE HEADLAMPS EQUIPPED WITH GAS-DISCHARGE LIGHT SOURCES
00 series of amendments
Date of Entry into Force: 15.04.96
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 03.01.98
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 10.12.02
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 30.10.03
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 12.08.04
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 13.11.04
Corr. 1 to Supplement 5 to the 00 series of amendments
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 04.07.06
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 10.10.06
Supplement 8 to the 00 series of amendments
Date of Entry into Force: 18.06.07
Supplement 9 to the 00 series of amendments
Date of Entry into Force: 11.07.08
Corr. 1 to Supplement 9 to the 00 series of amendments
Corr. 2 to Supplement 9 to the 00 series of amendments
Supplement 10 to the 00 series of amendments
Date of Entry into Force: 15.10.08
Corr. 1 to Supplement 10 to the 00 series of amendments
Supplement 11 to the 00 series of amendments
Date of Entry into Force: 22.07.09
Supplement 12 to the 00 series of amendments
Date of Entry into Force: 24.10.09
Erratum to Supplement 12 to the original version of the Regulation
Supplement 13 to the 00 series of amendments
Date of Entry into Force: 19.08.10
01 series of amendments
Date of Entry into Force: 09.12.10
Corr. 1 to the 01 series of amendments
Supplement 1 to the 01 series of amendments
Date of Entry into Force: 28.10.11
Corr. 1 to Revision 3 of the Regulation
Date of Entry into Force: 14.11.12
Supplement 2 to the 01 series of amendments
Date of Entry into Force: 26.07.12
Supplement 3 to the 01 series of amendments
Date of Entry into Force: 18.11.12
Supplement 4 to the 01 series of amendments
Date of Entry into Force: 15.07.13
Supplement 5 to the 01 series of amendments
Date of Entry into Force: 15.06.15
Supplement 6 to the 01 series of amendments
Date of Entry into Force: 08.10.15
Supplement 7 to the 01 series of amendments
Date of Entry into Force: 18.06.16
REGULATION NO. 98-01
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF MOTOR VEHICLE HEADLAMPS
EQUIPPED WITH GAS-DISCHARGE LIGHT SOURCES
Application for approval of a headlamp
TECHNICAL REQUIREMENTS FOR HEADLAMPS
Gauging of discomfort and/or disability
FURTHER ADMINISTRATIVE PROVISIONS
Modification of the headlamp type and extension of approval
Conformity of production
Penalties for non-conformity of production
Production definitely discontinued
Names and addresses of technical services responsible for conducting approval tests, and
of Type Approval Authorities
Communication Concerning the approval or extension or refusal or withdrawal of approval
or production definitively discontinued of a type of headlamp pursuant to Regulation No. 98
Examples of arrangements of approval marks
Spherical coordinate measuring system and test point locations
Tests for stability of photometric performance of headlamps in operation
Annex 4 – Appendix – Overview of operational periods concerning test for stability of
Requirements for lamps incorporating lenses of plastic material - testing of lens, or material
samples and of complete lamps
Annex 5 – Appendix 1 – Chronological order of approval tests
Annex 5 – Appendix 2 – Method of measurement of the diffusion and transmission
Annex 5 – Appendix 3 – Spray testing method
Annex 5 – Appendix 4 – Adhesive tape adherence test
Centre of reference
Minimum requirements for conformity of production control procedures
Minimum requirements for sampling by an inspector
Instrumental verification of the "cut-off" for passing beam headlamps
Requirements for LED modules and headlamps including LED modules
2. APPLICATION FOR APPROVAL OF A HEADLAMP
2.1. The application for approval shall be submitted by the owner of the trade name or mark of
the headlamp or by his duly accredited representative. It shall specify:
2.1.1. Whether the headlamp is intended to provide a passing beam, a driving beam or both;
2.1.2. Whether, if the headlamp is intended to provide a passing beam, it is designed for both
left-hand and right-hand traffic or for either left-hand or right-hand traffic only;
2.1.3. If the headlamp is equipped with an adjustable reflector, the mounting position(s) of the
headlamp in relation to the ground and the longitudinal median plane of the vehicle;
2.1.4. The maximum vertical angles above and below the nominal position(s) which the aiming
device can achieve;
2.1.5. Which light sources are energized when the various beam combinations are used and, in
case of a light source category with more than one objective luminous flux value, which
objective luminous flux value is used;
2.1.6. The category of light source as listed in Regulations Nos. 37 or 99 and their series of
amendments in force at the time of application for type approval and, in case of a light
source category with more than one objective luminous flux value, which objective luminous
flux value is used for passing beam and for driving beam;
2.2. Every application shall be accompanied by:
2.2.1. Drawings in triplicate in sufficient detail to permit identification of the type (see
Paragraphs 3.2 and 4.2 below). The drawings must show the position intended for the
approval number and the additional symbols in relation to the circle of the approval mark, in
case of LED module(s) also the space reserved for the specific identification code(s) of the
module(s), and must show the headlamp in vertical (axial) section and in front elevation,
with main details of the optical design including the flutings, if applicable.
2.2.2. A brief technical specification including, where it applies, the make and type of the ballast(s)
and, in the case where the headlamp is used to produce bend lighting, the extreme
positions according to Paragraph 6.2.7. below. In the case of LED module(s) this shall
a brief technical specification of the LED module(s);
a drawing with dimensions and the basic electrical and photometric values and the
objective luminous flux.
2.2.3. Samples, as follows:
184.108.40.206. For approval of a headlamp, two samples of each type of headlamp, one sample intended
for the installation on the left side of the vehicle and one sample intended for the installation
of the right side of the vehicle, with standard gas-discharge light source and one ballast of
each type to be used, where applicable;
3.5. In the case of lamps with LED module(s), the lamp shall bear the marking of the rated
voltage and rated wattage and the light source module specific identification code.
3.6. LED module(s) submitted along with the approval of lamp:
3.6.1. Shall bear the trade name or mark of the applicant. This marking shall be clearly legible and
3.6.2. Shall bear the specific identification code of the module. This marking shall be clearly legible
This specific identification code shall comprise the starting letters "MD" for "MODULE"
followed by the approval marking without the circle as prescribed in Paragraph 4.2.1. below
and in the case several non identical light source modules are used, followed by additional
symbols or characters. This specific identification code shall be shown in the drawings
mentioned in Paragraph 2.2.1. above. The approval marking does not have to be the same
as the one on the lamp in which the module is used, but both markings shall be from the
3.8. If an electronic light source control gear which is not part of a LED module is used to
operate a LED module(s), it shall be marked with its specific identification code(s), the rated
input voltage and wattage.
4.1.1. If all the samples of a type of headlamp submitted pursuant to Paragraph 2. above satisfy
the provisions of this Regulation, approval shall be granted.
4.1.2. Headlamps conforming to this Regulation may be grouped, combined or reciprocally
incorporated with any other lighting or light-signalling function(s) provided that their
respective lighting functions are not impaired.
4.1.3. Where grouped, combined or reciprocally incorporated lamps satisfy the requirements of
more than one Regulation, a single international approval mark may be affixed provided that
each of the grouped, combined or reciprocally incorporated lamps satisfies the provisions
applicable to it.
4.1.4. An approval number shall be assigned to each type approved. Its first two digits shall
indicate the series of amendments incorporating the most recent major technical
amendments made to the Regulation at the time of issue of the approval (at present 01).
The same Contracting Party may not assign the same number to another type of headlamp
covered by this Regulation. However, the matched pair is considered to be one type.
4.1.5. Notice of approval or of extension or refusal or withdrawal of approval or production
definitely discontinued of a type of headlamp pursuant to this Regulation shall be
communicated to the Parties to the 1958 Agreement applying this Regulation, by means of
a communication form conforming to the model in Annex 1 to this Regulation.
4.1.6. In addition to the mark prescribed in Paragraph 3.1., an approval mark as described in
Paragraphs 4.2. and 4.3. below shall be affixed in the spaces referred to in Paragraph 3.2.
above to every headlamp conforming to a type approved under this Regulation.
4.2.3. In every case the relevant operating mode used during the test procedure according to
Paragraph 220.127.116.11. of Annex 4 and the allowed voltage(s) according to Paragraph 18.104.22.168. of
Annex 4 shall be stipulated on the approval forms and on the communication forms
transmitted to the countries which are Contracting Parties to the Agreement and which apply
In the corresponding cases the device shall be marked as follows:
22.214.171.124. On headlamps meeting the requirements of this Regulation which are so designed that the
passing beam shall not be lit simultaneously with that of any other lighting function with
which it may be reciprocally incorporated: an oblique stroke (/) shall be placed behind
symbol indicating the headlamp producing the passing beam in the approval mark.
126.96.36.199. The requirement in Paragraph 188.8.131.52 above shall not apply to headlamps meeting the
requirements of this Regulation which are so designed that the passing beam and the
driving beam are provided by the same gas-discharge light source.
4.2.4. The two digits of the approval number which indicate the series of amendments
incorporating the most recent major technical amendments made to the Regulation at the
time of issue of the approval and, if necessary, the required arrow may be marked close to
the above additional symbols.
4.2.5. The marks and symbols referred to in Paragraphs 4.2.1. to 4.2.3. above shall be clearly
legible and be indelible. They may be placed on an inner or outer part (transparent or not) of
the headlamp, which cannot be separated from the transparent part of the headlamp
emitting the light.
4.3. Arrangement of the Approval Mark
4.3.1. Independent Lamps
Annex 2, Figures 1 to 9, to this Regulation give examples of arrangements of the approval
marks with the above-mentioned additional symbols.
4.3.2. Grouped, Combined or Reciprocally Incorporated Lamps
184.108.40.206. Where grouped, combined or reciprocally incorporated lamps have been found to comply
with the requirements of several Regulations, a single international approval mark may be
affixed, consisting of a circle surrounding the Letter "E" followed by the distinguishing
number of the country which has granted the approval, and an approval number. This
approval mark may be located anywhere on the grouped, combined or reciprocally
incorporated lamps, provided that:
220.127.116.11.1. It is visible as per Paragraph 4.2.5.
18.104.22.168.2. No part of the grouped, combined or reciprocally incorporated lamps that transmits light can
be removed without at the same time removing the approval mark.
B. TECHNICAL REQUIREMENTS FOR HEADLAMPS
5. GENERAL SPECIFICATIONS
5.1. Each sample shall comply with the specifications set forth in Paragraphs 6. to 8. below.
5.2. Headlamps shall be so made as to retain their prescribed photometric characteristics and to
remain in good working order when in normal use, in spite of the vibrations to which they
may be subjected.
5.2.1. Headlamps shall be fitted with a device enabling them to be so adjusted on the vehicle as to
comply with the rules applicable to them. Such a device need not be fitted on units in which
the reflector and the diffusing lens cannot be separated, provided the use of such units is
confined to vehicles on which the headlamps setting can be adjusted by other means.
Where a headlamp providing a principal passing beam and a headlamp providing a driving
beam, each equipped with its own light source(s), are assembled to form a composite unit,
the adjusting device shall enable each optical system individually to be duly adjusted. The
same provision applies to headlamps providing a front fog lamp beam and a driving beam,
and to headlamps providing a principal passing beam and a front fog lamp beam, and to
headlamps providing these three beams.
5.2.2. However, these provisions shall not apply to headlamp assemblies whose reflectors are
indivisible. For this type of assembly, the requirements of Paragraph 6.3. of this Regulation
5.3. Headlamps designed to satisfy the requirements of both right-hand and of left-hand traffic
may be adapted for traffic on a given side of the road either by an appropriate initial setting
when fitted on the vehicle or by selective setting by the user. Such initial or selective setting
may consist, for example, of fixing either the optical unit at a given angle on the vehicle or
the light source(s) at a given angle in relation to the optical unit. In all cases, only two
different and clearly distinct settings, one for right-hand and one for left-hand traffic, shall be
possible, and the design shall preclude inadvertent shifting from one setting to the other or
setting in an intermediate position. Where two different setting positions are provided for the
light source, the components for attaching the light source to the reflector must be so
designed and made that, in each of its two settings, the light source will be held in position
with the precision required for headlamps designed for traffic on only one side of the road.
Conformity with the requirements of this Paragraph shall be verified by visual inspection
and, where necessary, by a test fitting.
5.6. Complementary tests shall be done according to the requirements of Annex 4 to ensure that
in use there is no excessive change in photometric performance.
5.7. Light transmitting components made of plastic material shall be tested according to the
requirements of Annex 5.
5.8. Light Sources
5.8.1. The gas-discharge light source(s) used in gas-discharge headlamps shall be replaceable
and approved according to Regulation No. 99; and its series of amendments in force at the
time of application for type approval.
5.8.2. In the case that one or more (additional) filament light sources are used in the
gas-discharge headlamp, these filament light sources shall be replaceable and approved
according to Regulation No. 37 and its series of amendments in force at the time of
application for type approval, provided that no restriction on the use is made in
Regulation No. 37 and its series of amendments in force at the time of application for type
5.8.3. The design of the device shall be such that the light source(s) can be fixed in no other
position but the correct one.
5.8.4. The lamp holder shall conform to the dimensional characteristics as given on the data sheet
of IEC Publication 60061, relevant to the category of light source(s) used. The light
source(s) shall fit easily into the headlamp.
5.9. The headlamp and ballast system shall not generate radiated or power line disturbances to
cause a malfunction of other electric/electronic systems of the vehicle.
5.10. If it is necessary for the test procedure, the test house may require from the manufacturer
additional test samples, test benches (holders) or special power supplies.
5.11. The test procedure shall be carried out under the mounting specifications of the
5.12. The headlamp (if equipped with LED modules) and the LED module(s) themselves shall
comply with the relevant requirements specified in Annex 11 of this Regulation. The
compliance with the requirements shall be tested.
6.2. Provisions Concerning Passing Beams
6.2.1. The luminous intensity distribution of the passing beam headlamp shall incorporate a
"cut-off" (see Figure 1 below), which enables the headlamp to be adjusted correctly for the
photometric measurements and for the aiming on the vehicle.
The "cut-off" shall provide:
For right hand traffic beams:
a straight "horizontal part" towards the left;
a raised "elbow-shoulder" part towards the right.
For left hand traffic beams:
a straight "horizontal part" towards the right;
a raised "elbow − shoulder" part towards the left.
In each case the "elbow − shoulder" part shall have a sharp edge.
6.2.2. The headlamp shall be visually aimed by means of the "cut-off" (see Figure 1) as follows.
The aiming shall be carried out using a flat vertical screen set up at a distance of 10m or
25m (as indicated in Section 9 of Annex 1) forward of the headlamp and at right angles to
the H-V axis as shown in Annex 3 to this Regulation. The screen shall be sufficiently wide to
allow examination and adjustment of the "cut-off" of the passing beam over at least 5° on
either side of the V-V Line
22.214.171.124. For vertical adjustment: the horizontal part of the "cut-off" is moved upward from below
Line B and adjusted to its nominal position one per cent (0.57°) below the H-H Line;
“" Elbow ”"
“" Shoulder ”"
“" Cut - off ”"
The scales are different for vertical and horizontal lines.
126.96.36.199. One additional light source according to Regulation No. 37, and/or one or more LED
module(s) inside the passing beam headlamp, may be used for the purposes of generating
infrared radiation. It/they shall only be activated at the same time as the gas-discharge light
source. In the event that the gas-discharge light source fails, this additional light source
and/or LED module(s) shall be automatically switched off.
188.8.131.52. In the event of failure of an additional light source or LED module, the headlamp shall
continue to fulfil the requirements of the passing beam.
184.108.40.206. Measurement conditions with respect to light sources
220.127.116.11.1. In the case of a gas-discharge light source:
The voltage applied to the terminals of the ballast(s) is either 13.2V +/- 0.1 for 12V systems
or otherwise specified (See Annex 7).
18.104.22.168.2. In the case of a filament light source according to Regulation No. 37:
The lamp shall be measured by means of an uncoloured standard (étalon) filament lamp
designed for a rated voltage of 12V. During the checking, the voltage at the terminals of the
filament lamp shall be regulated so as to obtain the reference luminous flux at 13.2V as
indicated a the relevant data sheet of Regulation No. 37.
22.214.171.124.3. In the case of LED module(s):
The lamp shall be measured at 6.3V, 13.2V or 28.0V respectively, if not otherwise specified
within this Regulation. LED module(s) operated by an electronic light source control gear,
shall be measured as specified by the applicant.
6.2.6. The requirements in Paragraph 6.2.5. above shall also apply to headlamps designed to
provide bend lighting and/or that include the additional light source or LED module(s)
referred to in Paragraph 126.96.36.199. In the case of a headlamp designed to provide bend
lighting its alignment may be changed, provided that the axis of the beam is not displaced
vertically by more than 0.2°.
188.8.131.52. If bend lighting is obtained by:
184.108.40.206.1. Swivelling the passing beam or moving horizontally the kink of the elbow of the cut-off, the
measurements shall be carried out after the complete headlamp assembly has been
reaimed horizontally, e.g. by means of a goniometer;
220.127.116.11.2. Moving one or more optical parts of the headlamp without moving horizontally the kink of the
elbow of the cut-off, measurements shall be carried out with these parts being in their
extreme operating positions.
18.104.22.168.3. Means of one additional light source or one or more LED module(s) without moving
horizontally the kink of the elbow of the cut-off, measurements shall be carried out with this
light source or LED module(s) activated.
6.3. Provisions Concerning Driving Beams
6.3.1. In the case of a headlamp designed to provide a driving beam and a passing beam,
measurements of the luminous intensity of the driving beam shall be taken with the same
headlamp alignment as for measurements under Paragraph 6.2.5. above; in the case of a
headlamp providing a driving beam only, it shall be so adjusted that the area of maximum
luminous intensity is centred on the point of intersection of Lines H-H and V-V; such a
headlamp needs meet only the requirements referred to in Paragraph 6.3. Test voltages are
the same as in Paragraph 22.214.171.124.
6.3.2. It is possible to use several light sources for the driving beam, these light sources being
listed in either Regulation No. 37 (in this case the filament lamps shall be operated at their
reference luminous flux), in Regulation No. 99 and/or they can LED module(s). Where more
than one light source is used to provide the driving beam, these light sources shall be
operated simultaneously whilst determining the maximum value of luminous intensity (I ).
It is also possible that a part of the driving beam produced by one of these light sources will
be used exclusively for short time signals (flash to pass) as declared by the applicant. This
shall be indicated in the relevant drawing and a remark shall be made in the communication
6.3.3. Referring to Annex 3 Figure C, and the table below, the luminous intensity distribution of the
driving beam shall meet the following requirements.
Required luminous intensity
H-5L 0.0 , 5.0L 6,250
H-2.5L 0.0 , 2.5L 25,000
H-2.5R 0.0 , 2.5R 25,000
H-5R 0.0 , 5.0R 6,250
C. FURTHER ADMINISTRATIVE PROVISIONS
8. MODIFICATION OF THE HEADLAMP TYPE AND EXTENSION OF APPROVAL
8.1. Every modification of the headlamp type including the ballast shall be notified to the Type
Approval Authority which approved the headlamp type. The said department may then
8.1.1. Consider that the modifications made are unlikely to have appreciable adverse effects and
that in any event the headlamp still complies with the requirements; or
8.1.2. Require a further test report from the technical service responsible for conducting the tests.
8.2. Confirmation or refusal or approval, specifying the alterations, shall be communicated by the
procedure specified in Paragraph 4.1.5. above to the Contracting Parties to the Agreement
which apply this Regulation.
8.3. The competent authority issuing the extension of approval shall assign a series number to
each communication form drawn up for such an extension and inform thereof the other
Contracting Parties to the 1958 Agreement applying this Regulation by means of a
communication form conforming to the model in Annex 1 to this Regulation.
9. CONFORMITY OF PRODUCTION
9.1. Headlamps approved under this Regulation shall be so manufactured as to conform to the
type approved by meeting the requirements set forth in Paragraph 6.
9.2. In order to verify that the requirements of Paragraph 9.1. are met, suitable controls of the
production shall be carried out.
9.3. The holder of the approval shall in particular:
9.3.1. Ensure the existence of procedures for the effective control of the quality of products:
9.3.2. Have access to the control equipment necessary for checking the conformity to each
9.3.3. Ensure that data of test results are recorded and that related documents shall remain
available for a period to be determined in accordance with the administrative service;
9.3.4. Analyze the results of each type of test in order to verify and ensure the stability of the
product characteristics making allowance for variation of an industrial production;
9.3.5. Ensure that for each type of product at least the tests prescribed in Annex 8 to this
Regulation are carried out;
9.3.6. Ensure that any collecting of samples giving evidence of non-conformity with the type of test
considered shall give rise to another sampling and another test. All the necessary steps
shall be taken to re-establish the conformity of the corresponding production.
12. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF TYPE APPROVAL AUTHORITIES
The Contracting Parties to the 1958 Agreement applying this Regulation shall communicate
to the United Nations Secretariat the names and addresses of the technical services
responsible for conducting approval tests and of the Type Approval Authorities which grant
approval and to which forms certifying approval or extension or refusal or withdrawal of
approval, or production definitely discontinued, issued in other countries, are to be sent.
13. TRANSITIONAL PROVISIONS
13.1. From the date of entry into force of the 01 series of amendments to this Regulation no
Contracting Party applying it shall refuse to grant approvals under this Regulation as
amended by the 01 series of amendments.
13.2. Until 60 months after the date of entry into force of the 01 series of amendments to this
Regulation with regard to the changes introduced by the 01 series of amendments
concerning the photometric testing procedures involving the use of the spherical coordinate
system and the specification of luminous intensity values, and in order to allow the
Technical Services (test laboratories) to update their testing equipment, no Contracting
Party applying this Regulation shall refuse to grant approvals under this Regulation as
amended by the 01 series of amendments where existing testing equipment is used with
suitable conversion of the values, to the satisfaction of the type approval authority.
13.3. As from 60 months after the date of entry into force of the 01 series of amendments,
Contracting Parties applying this Regulation shall grant approvals only if the headlamp
meets the requirements of this Regulation as amended by the 01 series of amendments.
13.4. Existing approvals for headlamps already granted under this Regulation before the date of
entry into force of the 01 series of amendments shall remain valid indefinitely.
13.5. Contracting Parties applying this Regulation shall not refuse to grant extensions of
approvals to the preceding series to this Regulation.
9. Brief description:
9.1. Headlamp/system submitted for approval as type: ................................................................
9.2. The passing beam light source may/may not be lit simultaneously with the driving beam
light source and/or another reciprocally incorporated headlamp.
9.3. The rated voltage of the device is: .............................................................................................
9.4. Category (or categories) of light source(s) : .............................................................................
9.4.1. If more than one objective luminous flux value is specified: Objective luminous flux value
used for the principal passing beam ................................................................................... [lm]
9.4.2. If more than one objective luminous flux value is specified: Objective luminous flux value
used for the driving beam ................................................................................................... [lm]
9.5. Trade name and identification number of separate ballast(s) or part(s) of ballast(s): ...............
9.6. The adjustment of the "cut-off" has been determined at 10m / 25m
The determination of the minimum sharpness of the “cut-off” has been carried out at
9.7. Number and specific identification code(s) of LED module(s): .................................................
9.8. Distributed lighting system with one common gas-discharge light source Yes/No .
9.9. Remarks (if any): ........................................................................................................................
9.10. Measures according to Paragraph 5.4. of this Regulation: .......................................................
10. Approval mark position: .............................................................................................................
11. Reason(s) for extension of approval: .........................................................................................
EXAMPLES OF ARRANGEMENTS OF APPROVAL MARKS
a ≥ 8mm (on glass)
a ≥ 5mm (on plastic material)
The headlamp bearing the approval mark shown above is a headlamp approved in the Netherlands (E4),
under Approval Number 2439, meeting the requirements of this Regulation as amended by the 01 series
of amendments. The passing beam is designed for right-hand traffic only.
The Figure 30 indicates that the maximum luminous intensity of the driving beam is between 123,625
and 145,125 candelas.
Note: The approval number and additional symbols shall be placed close to the circle and either above
or below the Letter 'E', or to the right or left of that letter. The digits of the approval number shall be on
the same side of the Letter 'E' and face in the same direction.
The headlamp bearing the approval marking shown above is a headlamp meeting the requirements of
this Regulation, as amended by the 01 series of amendments, with a gas discharge light source for the
passing beam only and is equipped with a lens of plastic material, and designed:
For both traffic systems
For right-hand traffic only
The headlamp bearing the approval marking shown above is a headlamp meeting the requirements of
this Regulation, as amended by the 01 series of amendments, with gas discharge light sources for the
driving beam, and is combined or grouped or reciprocally incorporated with a front fog lamp.
Examples of possible simplified marking for grouped, combined or reciprocally incorporated
lamps fitted to the front of the vehicle
(The vertical and horizontal lines schematize the shape and overall arrangement of the light-signalling
device. They are not part of the approval mark.)
Lamp reciprocally incorporated or grouped with a headlamp
The above example corresponds to the marking of a lens intended to be used in different types of
a headlamp with a passing beam designed for both traffic systems and a driving beam with
a maximum luminous intensity comprised between 80,625 and 96,750 candelas
(as indicated by the Number 20) approved in the Netherlands (E4) in accordance with the
requirements of Regulation No. 8 as amended by the 04 series of amendments, and
a front position lamp approved in accordance with the 01 series of amendments to
A headlamp with a gas discharge passing beam and a driving beam with a maximum
luminous intensity comprised between 123,625 and 145,125 candelas (as indicated by the
Number 30), designed for both traffic systems and approved in the Netherlands in
accordance with the requirements of this Regulation, as amended by the 01 series of
amendments, which is reciprocally incorporated with the same front position lamp as above,
even either of the above-mentioned headlamps approved as a single lamp.
Figure 12 (continued)
The above example corresponds to the marking of a lens of plastic material and used in an assembly of
two headlamps approved in the Netherlands (E4) under Approval Number 81151, consisting of:
a headlamp emitting a halogen passing beam designed for both traffic systems and a
halogen driving beam with a maximum luminous intensity between x and y candelas,
meeting the requirements of Regulation No. 8 and,
a headlamp emitting a gas discharge driving beam with a maximum luminous intensity
comprised between w and z candelas, meeting the requirements of this Regulation, as
amended by the 01 series of amendments, maximum luminous intensities of the driving
beam contributors as a whole being comprised between 123,625 and 145,125 candelas as
shown by the Number 30.
MD E3 17325
The LED module bearing the light source module identification code shown above has been approved
together with a lamp approved in Italy (E3) under approval number 17325.
Passing Beam for Right-hand Traffic
TESTS FOR STABILITY OF PHOTOMETRIC PERFORMANCE OF
HEADLAMPS IN OPERATION
TEST ON COMPLETE HEADLAMPS
Once the photometric values have been measured according to the prescriptions of this
Regulation, in the point for I for driving beam and in Points HV, 50R and B 50L for
passing beam (or HV, 50L, B50R for headlamps designed for left-hand traffic) a complete
headlamp sample shall be tested for stability of photometric performance in operation.
"Complete headlamp" shall be understood to mean the complete lamp itself including
ballast(s) and those surrounding body parts and lamps which could influence its thermal
The tests shall be carried out:
In a dry and still atmosphere at an ambient temperature of 23°C ± 5°C, the test
sample being mounted on a base representing the correct installation on the vehicle;
In case of replaceable light sources: using mass production filament light sources,
which have been aged for at least one hour, or mass production gas-discharge light
sources, which have been aged for at least 15 hours or mass produced LED modules
which has been aged for at least 48 hours and cooled down to ambient temperature
before starting the tests as specified in this Regulation. The LED modules supplied by
the applicant shall be used.
The measuring equipment shall be equivalent to that used during headlamp type-approval
The test sample shall be operated without being dismounted from or readjusted in relation to
its test fixture. The light source used shall be a light source of the category specified for that
1. TEST FOR STABILITY OF PHOTOMETRIC PERFORMANCE
The tests shall be carried out in a dry and still atmosphere at an ambient temperature of
23°C ± 5°C, the complete headlamp being mounted on a base representing the correct
installation on the vehicle.
126.96.36.199. Test Voltage
The voltage shall be applied to the terminals of the test sample as follows:
In case of replaceable filament light source(s) operated directly under vehicle voltage
system conditions: the test shall be performed at 6.3V, 13.2V or 28.0V as applicable
except if the applicant specifies that the test sample may be used at a different
voltage. In this case, the test shall be carried out with the filament light source
operated at the highest voltage that can be used.
In case of replaceable gas discharge light source(s): The test voltage for the
electronic light source control-gear is 13.2 ± 0.1V for 12V vehicle voltage system, or
otherwise specified in the application for approval.
In the case of non-replaceable light source operated directly under vehicle voltage
system conditions: All measurements on lighting units equipped with non-replaceable
light sources (filament light sources and/or others) shall be made at 6.3V, 13.2V or
28.0V or at other voltages according to the vehicle voltage system as specified by the
In the case of light sources, replaceable or non-replaceable, being operated
independently from vehicle supply voltage and fully controlled by the system, or, in
the case of light sources supplied by a supply and operating device, the test voltages
as specified above shall be applied to the input terminals of that device. The test
laboratory may require from the manufacturer the supply and operating device or a
special power supply needed to supply the light source(s).
LED module(s) shall be measured at 6.75V, 13.2V or 28.0V respectively, if not
otherwise specified within this Regulation. LED module(s) operated by an electronic
light source control gear shall be measured as specified by the applicant.
Where signalling lamps are grouped, combined or reciprocally incorporated into the
test sample and operating at voltages other than the nominal rated voltages of 6V,
12V or 24V respectively, the voltage shall be adjusted as declared by the
manufacturer for the correct photometric functioning of that lamp.
1.1.2. Test Results
188.8.131.52. Visual Inspection:
Once the headlamp has been stabilized to the ambient temperature, the headlamp lens and
the external lens, if any, shall be cleaned with a clean, damp cotton cloth. It shall then be
inspected visually; no distortion, deformation, cracking or change in colour of either the
headlamp lens or the external lens, if any, shall be noticeable.
184.108.40.206.2. For headlamp with outside lens in plastic material:
The mixture of water and polluting agent to be applied to the headlamp shall be composed
9 parts by weight of silica sand with a particle size of 0-100µm,
1 part by weight of vegetal carbon dust produced from beechwood with a particle size of
0.2 part by weight of NaCMC ,
5 parts by weight of sodium chloride (pure at 99%),
13 parts by weight of distilled water with a conductivity of ≤ 1µS/m, and
2 ± 1 parts by weight of surface-actant .
The mixture must not be more than 14 days old.
220.127.116.11. Application of the test mixture to the headlamp:
The test mixture shall be uniformly applied to the entire light-emitting surface of the
headlamp and then left to dry. This procedure shall be repeated until the illuminating value
has dropped to 15-20% of the values measured for each following point under the
conditions described in this Annex:
Point E in passing beam/driving beam and in driving beam only,
50R and 50V for a headlamp producing only a passing beam, designed for right-hand
50L and, 50V for a headlamp producing only a passing beam, designed for left-hand
2. TEST FOR CHANGE IN VERTICAL POSITION OF THE CUT-OFF LINE UNDER THE
INFLUENCE OF HEAT.
This test consists of verifying that the vertical drift of the cut-off line under the influence of
heat does not exceed a specified value for an operating headlamp producing a passing
The headlamp tested in accordance with Paragraph 1. shall be subjected to the test
described in Paragraph 2.1., without being removed from or readjusted in relation to its test
If the headlamp has a moving reflector, only the position closest to the average vertical
angular stroke is chosen for this test.
ANNEX 4 - APPENDIX
OVERVIEW OF OPERATIONAL PERIODS CONCERNING TEST FOR STABILITY OF
Abbreviations: P: passing beam lamp
D: driving beam lamp (D + D means two driving beams)
F: front fog lamp
means a cycle of 15min off and 5min lit.
means a cycle of 9min off and 1min lit
means a cycle of 15min lit and 5min off
All the following grouped headlamps and front fog lamps together with the added marking symbols are
given as examples and are not exhaustive.
1. P or D or F (DC or DR or B)
P, D or F
Additional light source or LED module(s) of bend light
2. P+F (DC B) or P+D (DCR)
Additional light source or LED module(s) of bend light
D or F
3. P+F (DC B/) or DC/B or P+D (DC/R)
D or F
Additional light source or LED module(s) of bend light
REQUIREMENTS FOR LAMPS INCORPORATING LENSES OF PLASTIC MATERIAL – TESTING
OF LENS OR MATERIAL SAMPLES AND OF COMPLETE LAMPS
1. GENERAL SPECIFICATIONS
1.1. The samples supplied pursuant to Paragraphs 2.2.5. and 2.3. of this Regulation shall satisfy
the specifications indicated in Paragraphs 2.1. to 2.5. below.
1.2. The two samples of complete lamps/systems supplied pursuant to Paragraph 2.2.4. of this
Regulation and incorporating lenses of plastic material shall, with regard to the lens
material, satisfy the specifications below.
1.3. The samples of lenses of plastic material or samples of material shall be subjected, with the
reflector to which they are intended to be fitted (where applicable), to approval tests in the
chronological order indicated in Table A reproduced in Appendix 1 to this Annex.
1.4. However, if the lamp manufacturer can prove that the product has already passed the tests
prescribed in Paragraphs 2.1. to 2.5. below, or the equivalent tests pursuant to another
Regulation, those tests need not be repeated; only the tests prescribed in Appendix 1,
Table B, shall be mandatory.
1.5. If the headlamps are designed for right-hand installation only, or for left-hand installation
only, tests pursuant to this Annex may be done on one sample only, at the choice of the
2.1. Resistance to Temperature Changes
Three new samples (lenses) shall be subjected to five cycles of temperature and humidity
(RH = relative humidity) change in accordance with the following programme:
3 hours at 40°C ± 2°C and 85-95% RH;
1 hour at 23°C ± 5°C and 60-75% RH;
15 hours at -30°C ± 2°C;
1 hour at 23°C ± 5°C and 60-75% RH;
3 hours at 80°C ± 2°C;
1 hour at 23°C ± 5°C and 60-75% RH;
2.2.2. Resistance to Chemical Agents
After the test described in Paragraph 2.2.1. above and the measurement described in
Paragraph 18.104.22.168. below have been carried out, the outer face of the said three samples
shall be treated as described in Paragraph 22.214.171.124. with the mixture defined in
Paragraph 126.96.36.199. below.
188.8.131.52. Test mixture
The test mixture shall be composed of 61.5% n-heptane, 12.5% toluene, 7.5%
ethyl tetrachloride, 12.5% trichloroethylene and 6% xylene (volume %).
184.108.40.206. Application of the test mixture
Soak a piece of cotton cloth (as per ISO 105) until saturation with the mixture defined in
Paragraph 220.127.116.11. above and, within 10 seconds, apply it for 10min to the outer face of the
sample at a pressure of 50N/cm , corresponding to an effort of 100N applied on a test
surface of 14 × 14mm.
During this 10min period, the cloth pad shall be soaked again with the mixture so that the
composition of the liquid applied is continuously identical with that of the test mixture
During the period of application, it is permissible to compensate the pressure applied to the
sample in order to prevent it from causing cracks.
At the end of the application of the test mixture, the samples shall be dried in the open air
and then washed with the solution described in Paragraph 2.3. (Resistance to detergents) at
23°C ± 5°C.
Afterwards the samples shall be carefully rinsed with distilled water containing not more
than 0.2% impurities at 23°C ± 5°C and then wiped off with a soft cloth.
18.104.22.168. After the test of resistance to atmospheric agents, the outer face of the samples shall be
free from cracks, scratches, chipping and deformation, and the mean variation in
transmission Δt = (T2 - T3)/T2, measured on the three samples according to the procedure
described in Appendix 2 to this Annex shall not exceed 0.020 (Δt ≤ 0 020).
22.214.171.124. After the test of resistance to chemical agents, the samples shall not bear any traces of
chemical staining likely to cause a variation of flux diffusion, whose mean variation
Δd = (T5 - T4)/T2, measured on the three samples according to the procedure described in
Appendix 2 to this Annex shall not exceed 0.020 (Δ d ≤ 0.020).
After this test, the variations:
in transmission :
and in diffusion:
Δt = (T2- T3)/T2
Δd = (T5- T4)/T2
shall be measured according to the procedure described in Appendix 2 in the area specified
in Paragraph 2.2.4. above. The mean value of the three samples shall be such that:
Δt ≤ 0.100;
Δd ≤ 0.050.
2.5. Test of Adherence of Coatings, if any
2.5.1. Preparation of the Sample
A surface of 20mm × 20mm in area of the coating of a lens shall be cut with a razor blade or
a needle into a grid of squares approximately 2mm × 2mm. The pressure on the blade or
needle shall be sufficient to cut at least the coating.
2.5.2. Description of the Test
Use an adhesive tape with a force of adhesion of 2N/(cm of width) ± 20% measured under
the standardized conditions specified in Appendix 4 to this Annex. This adhesive tape,
which shall be at least 25mm wide, shall be pressed for at least five minutes to the surface
prepared as prescribed in Paragraph 2.5.1.
Then the end of the adhesive tape shall be loaded in such a way that the force of adhesion
to the surface considered is balanced by a force perpendicular to that surface. At this stage,
the tape shall be torn off at a constant speed of 1.5m/s ± 0.2m/s.
There shall be no appreciable impairment of the gridded area. Impairments at the
intersections between squares or at the edges of the cuts shall be permitted, provided that
the impaired area does not exceed 15% of the gridded surface.
2.6. Tests of the Complete Headlamp Incorporating a Lens of Plastic Material
2.6.1. Resistance to Mechanical Deterioration of the Lens Surface
The lens of lamp sample No. 1 shall be subjected to the test described in Paragraph 2.4.1.
ANNEX 5 - APPENDIX 1
CHRONOLOGICAL ORDER OF APPROVAL TESTS
A. Tests on plastic materials (lenses or samples of material supplied pursuant to
Paragraph 2.2.4. of this Regulation)
Lenses or samples of material
Resistance to light
ANNEX 5 - APPENDIX 2
METHOD OF MEASUREMENT OF THE DIFFUSION AND TRANSMISSION OF LIGHT
1. EQUIPMENT (see Figure)
The beam of a collimator K with a half divergence β/2 = 17.4 × 10 rd is limited by a
diaphragm D with an opening of 6mm against which the sample stand is placed.
A convergent achromatic lens L , corrected for spherical aberrations, links the diaphragm D
with the receiver R; the diameter of the lens L shall be such that it does not diaphragm the
light diffused by the sample in a cone with a half top angle of β/2 = 14°.
An annular diaphragm D with angles α/2 = 1° and α
plane of the lens L .
/2 = 12° is placed in an image focal
The non-transparent central part of the diaphragm is necessary in order to eliminate the light
arriving directly from the light source. It shall be possible to remove the central part of the
diaphragm from the light beam in such a manner that it returns exactly to its original
The distance L D and the focal length F of the lens L shall be so chosen that the image
of D completely covers the receiver R.
When the initial incident flux is referred to 1 000 units, the absolute precision of each
reading shall be better than 1 unit.
The following readings shall be taken:
part of D
T no no Incident flux in initial reading
Flux transmitted by the new material in
a field of 24°
Flux transmitted by the tested material
in a field of 24°
Flux diffused by the new material
Flux diffused by the tested material
ANNEX 5 - APPENDIX 3
SPRAY TESTING METHOD
1. TEST EQUIPMENT
1.1. Spray Gun
The spray gun used shall be equipped with a nozzle 1.3mm in diameter allowing a liquid
flow rate of 0.24 ± 0.02 l/min at an operating pressure of 6.0 bar -0, +0.5 bar.
Under these operation conditions the fan pattern obtained shall be 170mm ± 50mm in
diameter on the surface exposed to deterioration, at a distance of 380mm ± 10mm from the
1.2. Test Mixture
The test mixture shall be composed of:
Silica sand of hardness 7 on the Mohr scale, with a grain size between 0 and 0.2mm
and an almost normal distribution, with an angular factor of 1.8 to 2;
Water of hardness not exceeding 205 g/m for a mixture comprising 25 g of sand per
litre of water.
The outer surface of the lamp lenses shall be subjected once or more than once to the
action of the sand jet produced as described above. The jet shall be sprayed almost
perpendicular to the surface to be tested.
The deterioration shall be checked by means of one or more samples of glass placed as a
reference near the lenses to be tested. The mixture shall be sprayed until the variation in the
diffusion of light on the sample or samples measured by the method described in Appendix
2, is such that:
T − T
Δ d = = 0.0250 ± 0.0025
Several reference samples may be used to check that the whole surface to be tested has
CENTRE OF REFERENCE
a = 2mm min
This optional mark of the centre of reference shall be positioned on the lens at its intersection with the
reference axis of the passing beam, and also on the lenses of the driving beams when they are neither
grouped nor combined nor reciprocally incorporated with a passing beam.
The above drawing represents the mark of the centre of reference as projected on a plane substantially
tangent to the lens about the centre of the circle. The lines constituting this mark may either be solid or
MINIMUM REQUIREMENTS FOR CONFORMITY OF PRODUCTION CONTROL PROCEDURES
1.1. The conformity requirements shall be considered satisfied from a mechanical and geometric
standpoint, if the differences do not exceed inevitable manufacturing deviations within the
requirements of this Regulation.
1.2. With respect to photometric performance, the conformity of mass-produced headlamps shall
not be contested if, when testing photometric performance of any headlamp chosen at
random and measured at 13.2V ± 0.1V or as otherwise specified and:
Equipped with a replaceable standard gas-discharge light source according to
Paragraph 6.1.3. The luminous flux of this gas-discharge light source may differ from the
objective luminous flux value specified in Regulation No. 99. In this case, the illuminances
shall be corrected accordingly.
Equipped with the serial production gas-discharge light source and the serial ballast, if any.
The luminous flux of this light source may deviate from the objective luminous flux due to
light source and ballast tolerances as specified in Regulation No. 99; accordingly the
measured illuminances may be corrected by 20% in the favourable direction.
1.2.1. No illuminance value, if measured and corrected according to Paragraph 1.2. above,
deviates unfavourably by more than 20% from the values prescribed in this Regulation. For
values B50L (orR) and in Zone A, the maximum unfavourable deviation may be
1.2.2. or if
B50L (or R):
170cd equivalent 20%
255cd equivalent 30%
Zone A 255cd equivalent 20%
380cd equivalent 30%
126.96.36.199. For the passing beam, the values prescribed in this Regulation are met at HV (with a
tolerance of + 170cd) and related to that aiming at one point within a circle of 0.35° around
Points B50L (or R) (with a tolerance of 85cd), 75R (or L), 50V, 25R1, 25L2, and on
2.2.2. In any test of conformity carried out by the manufacturer, equivalent methods may be used
with the consent of the competent authority responsible for approval tests. The
manufacturer is responsible for proving that the applied methods are equivalent to those laid
down in this Regulation.
2.2.3. The application of Paragraphs 2.2.1. and 2.2.2. requires regular calibrations of test
apparatus and its correlation with measurements made by a competent authority.
2.2.4. In all cases the reference methods shall be those of this Regulation, particularly for the
purpose of administrative verification and sampling.
2.3. Nature of Sampling
Samples of headlamps shall be selected at random from the production of a uniform batch.
A uniform batch means a set of headlamps of the same type, defined according to the
production methods of the manufacturer.
The assessment shall in general cover series production from individual factories. However,
a manufacturer may group together records concerning the same type from several
factories, provided these operate under the same quality system and quality management.
2.4. Measured and Recorded Photometric Characteristics
The sampled headlamps shall be subjected to photometric measurements at the points
provided for in the Regulation, the reading being limited to Points I , HV , HL, HR in the
case of the driving beam, and to Points B50L (or R) HV, 50V, 75R (or L) and 25L2 (or R2)
in the case of the passing beam (see Figure in Annex 3).
2.5. Criteria Governing Acceptability
The manufacturer is responsible for carrying out a statistical study of the test results and for
defining, in agreement with the competent authority, criteria governing the acceptability of
his products in order to meet the specifications laid down for verification of conformity of
products in Paragraph 9.1. of this Regulation.
The criteria governing the acceptability shall be such that, with a confidence level of 95%,
the minimum probability of passing a spot check in accordance with Annex 9 (first sampling)
would be 0.95.
188.8.131.52. and if, for the driving beam, HV being situated within the isolux 0.75 I , a tolerance of
+ 20% for maximum values and - 20% for minimum values is observed for the photometric
values at any measuring point specified in Paragraph 6.3. of this Regulation. The reference
mark is disregarded.
1.2.3. If the results of the tests described above do not meet the requirements, the alignment of
the headlamp may be changed, provided that the axis of the beam is not displaced laterally
by more than 0.5° to the right or left and not by more than 0.2° up or down.
1.2.4. If the results of the tests described above do not meet the requirements, tests on the
headlamp shall be repeated using another standard gas-discharge light source or
gas-discharge light source and ballast, whatever is applicable according to Paragraph 1.2.
1.3. With respect to the verification of the change in vertical position of the cut-off line under the
influence of heat, the following procedure shall be applied:
One of the sampled headlamps shall be tested according to the procedure described in
Paragraph 2.1. of Annex 4 after being subjected three consecutive times to the cycle
described in Paragraph 2.2.2. of Annex 4.
The headlamp shall be considered acceptable if Δr (as defined in Paragraphs 2.1. and 2.2.
of Annex 4 to this Regulation) does not exceed 1.5mrad.
If this value exceeds 1.5mrad but is not more than 2.0mrad, a second headlamp shall be
subjected to the test after which the mean of the absolute values recorded on both samples
shall not exceed 1.5mrad.
1.4. The chromaticity coordinates shall be complied with.
1.5. If, however, vertical adjustment cannot be performed repeatedly to the required position
within the tolerances described in Paragraph 184.108.40.206. of this Regulation, one sample shall be
tested according to the procedure described in Paragraphs 2. and 3. of Annex 10.
2. FIRST SAMPLING
In the first sampling four headlamps are selected at random. The first sample of two is
marked A, the second sample of two is marked B.
2.1. The Conformity is not Contested
2.1.1. Following the sampling procedure shown in Figure 1 of this Annex the conformity of
mass-produced headlamps shall not be contested if the deviation of the measured values of
the headlamps in the unfavourable directions are:
220.127.116.11. Sample A
one headlamp not more than
both headlamps more than
but not more than
go to Sample B
2.3.2. Sample B
in the case of A2
one headlamp more than
but not more than
one headlamp more than
B5: in the case of A2
both headlamps more than 20%
in the case of A2
one headlamp more than
2.3.3. or if the conditions of Paragraph 1.2.2. for Samples A and B are not fulfilled.
3. REPEATED SAMPLING
In the cases of A3, B2, B3 a repeated sampling, third Sample C of two headlamps and
fourth Sample D of two headlamps, selected from stock manufactured after alignment, is
necessary within two months time after the notification.
3.1. The conformity is not Contested
3.1.1. Following the sampling procedure shown in Figure 1 of this Annex the conformity of
mass-produced headlamps shall not be contested if the deviations of the measured values
of the headlamps are:
18.104.22.168. Sample C
22.214.171.124. Sample D
one headlamp not more than
both headlamps more than
but not more than
go to Sample D
D1: in the case of C2
both headlamps 0%
3.1.2. or if the conditions of Paragraph 1.2.2. for Sample C are fulfilled.
3.2. The Conformity is Contested
3.2.1. Following the sampling procedure shown in Figure 1 of this Annex the conformity of
mass-produced headlamps shall be contested and the manufacturer requested to make his
production meet the requirements (alignment) if the deviations of the measured values of
the headlamps are:
The part of the horizontal "cut-off" that serves for vertical adjustment shall be horizontal
between 1.5° and 3.5° from the V-V Line (see Figure 1 below).
(a) The inflection points of the "cut-off" gradient at the vertical lines at 1.5°, 2.5° and 3.5°
shall be determined by the equation:
(d (log E)/dβ = 0).
The maximum vertical distance between the inflection points determined shall not
3. VERTICAL AND HORIZONTAL AJDUSTMENT
If the "cut-off" complies with the quality requirements of Paragraph 2. of this Annex the
beam adjustment may be performed instrumentally.
The scales are different for vertical and horizontal lines.
Measurement of "cut-off" Quality
The "3 line" method (see Figure 3 below)
Three vertical lines shall be scanned from 2° D to 2° U at 1° R, 2° R, and 3° R after the lamp
has been aimed vertically. The respective maximum gradients "G" determined using the
G = (log E − log E )
Where β is the vertical position in degrees, shall not be less than 0.08. The inflection points
found on the three lines shall be used to derive a straight line. The intersection of this line
and the Line B found while performing vertical aim shall be placed on the V Line.
The scales are different for vertical and horizontal lines.
Instrumental Vertical and Horizontal Adjustment-Three Line Scan Method
3.2.2. Ambient Temperature
For the measurement of electrical and photometric characteristics, the headlamp shall be
operated in dry and still atmosphere at an ambient temperature of 23°C ± 5°C.
Upon the request of the applicant the LED module shall be operated for 15 h and cooled
down to ambient temperature before starting the tests as specified in this Regulation.
4. SPECIFIC REQUIREMENTS AND TESTS
The UV-radiation of a low-UV-type LED module shall be such that:
( λ) S( λ)
( λ) V( λ)
W / lm
S(λ)(unit: l) is the spectral weighting function;
k = 683 lm/W is the maximum value of the luminous efficacy of radiation.
(For definitions of the other symbols see Paragraph 4.1.1. of Annex 9 to Regulation
This value shall be calculated using intervals of one nanometer. The UV-radiation shall be
weighted according to the values as indicated in the Table UV below:
Table UV: Values according to "IRPA/INIRC Guidelines on limits of exposure to ultraviolet
radiation". Wavelengths (in nanometres) chosen are representative; other values should be