Regulation No. 20-03

Name:Regulation No. 20-03
Description:Headlamps - Asymmetrical Passing/Driving Beam - Halogen Filament Lamps H4.
Official Title:Uniform Provisions Concerning the Approval of: Motor Vehicle Headlamps Emitting an Asymmetrical Passing Beam or a Driving Beam or Both and Equipped with Halogen Filament Lamps (H4 Lamps).
Country:ECE - United Nations
Date of Issue:1971-03-01
Amendment Level:03 Series
Number of Pages:61
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck
Subject Categories:Lighting and Light Signalling Equipment
Available on InterRegs.NET

Our online subscription service, offering immediate access to our extensive library of global vehicle regulations, standards and legislation. A fully searchable, accurate, user-friendly resource for consolidated regulations that are updated quickly and frequently.

Tell me more | Already a subscriber

Available on SelectRegs.com

Our fast and easy means of purchasing up-to-date global vehicle and component standards and regulations on a pay-as-you-go basis. Pay securely by credit card and your documents are delivered directly and immediately to your computer as PDF files.

Tell me more | Go straight to site

Keywords:

headlamp, regulation, approval, beam, test, headlamps, requirements, lamp, paragraph, passing, annex, filament, tests, driving, samples, traffic, type, lens, point, lamps, amendments, series, values, photometric, material, mark, position, production, sample, designed, conformity, light, approved, figure, maximum, left-hand, prescribed, right-hand, force, lenses, results, measured, case, line, standard, accordance, provisions, illumination, incorporated, paragraphs

Text Extract:

All InterRegs documents are formatted as PDF files and contain the full text, tables, diagrams and illustrations of the original as issued by the national government authority. We do not re-word, summarise, cut or interpret the regulatory documents. They are consolidated, published in English, and updated on a regular basis. The following text extract indicates the scope of the document, but does not represent the actual PDF content.

E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.19/Rev.3
October 10, 2006
STATUS OF UNITED NATIONS REGULATION
ECE 20
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
MOTOR VEHICLE HEADLAMPS EMITTING AN ASYMMETRICAL
PASSING BEAM OR A DRIVING BEAM OR BOTH AND EQUIPPED
WITH HALOGEN FILAMENT LAMPS (H LAMPS)
Incorporating:
Supplement 2 to the 02 series of amendments
Date of Entry into Force: 27.10.92
Supplement 3 to the 02 series of amendments
Date of Entry into Force: 02.12.92
Supplement 4 to the 02 series of amendments
Date of Entry into Force: 05.03.94
Supplement 5 to the 02 series of amendments
Date of Entry into Force: 27.11.94
Corr. 1 to Supplement 3 to the 02 series of amendments
Dated: 30.11.94
Corr. 1 to Revision 2 to the 02 series of amendments
Dated: 04.08.95
Supplement 6 to the 02 series of amendments
Date of Entry into Force: 25.12.97
03 series of amendments
Date of Entry into Force: 09.09.01

REGULATION NO. 20
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF MOTOR VEHICLE
HEADLAMPS EMITTING AN ASYMMETRICAL PASSING BEAM OR A DRIVING BEAM
OR BOTH AND EQUIPPED WITH HALOGEN FILAMENT LAMPS (H LAMPS)
REGULATION
A. ADMINISTRATIVE PROVISIONS
-
Scope
1.
Definitions
2.
Application for approval of a headlamp
3.
Markings
4.
Approval
CONTENTS
B. TECHNICAL REQUIREMENTS FOR HEADLAMPS
5.
General specifications
6.
Illumination
7.
Provisions concerning coloured lenses and filters
8.
Gauging of discomfort
9.
Standard (reference) headlamp
10.
Observation concerning colour
C. FURTHER ADMINISTRATIVE PROVISIONS
11.
Modification of the headlamp type and extension of approval
12.
Conformity of production
13.
Penalties for non-conformity of production
14.
Production definitely discontinued
15.
Names and addresses of technical services responsible for conducting approval tests and of
administrative departments
16.
Transitional provisions

REGULATION NO. 20
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF MOTOR VEHICLE
HEADLAMPS EMITTING AN ASYMMETRICAL PASSING BEAM OR A DRIVING BEAM
OR BOTH AND EQUIPPED WITH HALOGEN FILAMENT LAMPS (H LAMPS)
A. ADMINISTRATIVE PROVISIONS
Scope
This Regulation applies to motor vehicle headlamps which may incorporate lenses of glass
or plastic material.
1. DEFINITIONS
For the purpose of this Regulation,
1.1. "Lens" means the outermost component of the headlamp (unit) which transmits light
through the illuminating surface;
1.2. "Coating" means any product or products applied in one or more layers to the outer face of
a lens;
1.3. Headlamps of different "types" are headlamps which differ in such essential respects as:
1.3.1. the trade name or mark;
1.3.2. the characteristics of the optical system;
1.3.3. the inclusion or elimination of components capable of altering the optical effects by
reflection, refraction, absorption and/or deformation during operation. However, the fitting or
elimination of filters intended solely to change the colour of the beam but not its light
distribution does not entail a change of type;
1.3.4. suitability for right-hand or left-hand traffic or for both traffic systems;
1.3.5. the kind of beam produced (passing beam, driving beam or both);
1.3.6. the materials constituting the lenses and coating, if any.

3. MARKINGS
3.1. Headlamps submitted for approval shall bear the trade name or mark of the applicant.
3.2. They shall comprise, on the lens and on the main body, spaces of sufficient size for the
approval mark and the additional symbols referred to in Paragraph 4; these spaces shall be
indicated on the drawings referred to in Paragraph 2.2.1. above.
3.3. Headlamps designed to satisfy the requirements both of right-hand and of left-hand traffic
shall bear markings indicating the two settings of the optical unit on the vehicle or of the
filament lamp on the reflector; these markings shall consist of the Letters "R/D" for the
position for right-hand traffic and the Letters "L/G" for the position for left-hand traffic.
4. APPROVAL
4.1. General
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. 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.
4.1.3. An approval number shall be assigned to each type approved. Its first two digits
(at present 02) 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. The
same Contracting Party may not assign the same number to another type of headlamp
covered by this Regulation, except if the approval is extended to a device which only differs
from the already approved device by the colour of the light emitted.
4.1.4. 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 form conforming to the model shown in Annex 1 to this Regulation, with the indications
according to Paragraph 2.2.1.1.
4.1.4.1. if the headlamp is equipped with an adjustable reflector and if this headlamp is to be used
only in mounting positions according to the indications in Paragraph 2.2.1.1., the applicant
shall be obliged by the Approval Authority to inform the user in a proper way about the
correct mounting position(s).
4.1.5. 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 1.1.1.1. of Annex 5 and the permitted voltage(s) according to Paragraph 1.1.1.2.
of Annex 5 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
this Regulation.
In the corresponding cases the device shall be marked as follows:
4.2.3.1. On headlamps meeting the requirements of this Regulation which are so designed that the
filament of 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 the passing lamp symbol in the approval mark.
4.2.3.2. On headlamps meeting the requirements of Annex 5 to this Regulation only when supplied
with a voltage of 6 V or 12 V, a symbol consisting of the Number 24 crossed out by an
oblique cross (X), shall be placed near the filament lamp holder.
4.2.4. The two digits of the approval number (at present 02) 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. and 4.2.2. above shall be clearly
legible and be indelible even when the headlamp is fitted in the vehicle.
4.3. Arrangement of the Approval Mark
4.3.1. Independent Lamps
Annex 3, Figures 1 to 9, to this Regulation gives examples of arrangements of the approval
mark with the above-mentioned additional symbols.
4.3.2. Grouped, Combined or Reciprocally Incorporated Lamps
4.3.2.1. 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:
4.3.2.1.1. it is visible after their installation;
4.3.2.1.2. 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 conform to 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 vehicles 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 headlamp setting can be adjusted by other means.
Where a headlamp providing a passing beam and a headlamp providing a driving beam,
each equipped with its own filament lamp, are assembled to form a composite unit the
adjusting device shall enable each optical system individually to be duly adjusted.
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
shall apply.
5.3. The components by which the filament lamp is fixed to the reflector shall be so made that,
even in darkness, the filament lamp can be fixed in no position but the correct one. . The
filament lamp holder shall conform to the characteristics given on data sheet 7005-39-1 of
IEC Publication 61-2, third edition, 1969.
5.4. Headlamps designed to satisfy the requirements both of 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 filament lamp 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
filament lamp, the components for attaching the filament lamp to the reflector must be so
designed and made that, in each of its two settings, the filament lamp 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.
5.5. Complementary tests shall be done according to the requirements of Annex 5 to ensure that
in use there is no excessive change in photometric performance.
5.6. If the lens of the headlamp is of plastic material, tests shall be done according to the
requirements of Annex 6.

6.2.2. The headlamp shall be so aimed that
6.2.2.1. in the case of headlamps designed to meet the requirements of right-hand traffic, the
"cut-off" on the left-half of the screen is horizontal and, in the case of headlamps designed
to meet the requirements of left-hand traffic, the "cut-off" on the right-half of the screen is
horizontal;
6.2.2.2. this horizontal part of the "cut-off" is situated on the screen 25 cm below the Level hh (see
Annex 4);
6.2.2.3. the "elbow" of the "cut-off" is on Line vv.
6.2.3. When so aimed, the headlamp need, if its approval is sought solely for provision of a
passing beam, comply only with the requirements set out in Paragraphs 6.2.5. to 6.2.7.
below; if it is intended to provide both a passing beam and a driving beam, it shall comply
with the requirements set out in Paragraphs 6.2.5. to 6.2.7. and 6.3.
6.2.4. Where a headlamp so aimed does not meet the requirements set out in
Paragraphs 6.2.5. to 6.2.7. and 6.3., its alignment may be changed provided that the axis of
the beam is not displaced laterally by more than 1° (= 44 cm) to the right or left. To
facilitate alignment by means of the "cut-off", the headlamp may be partially occulted in
order to sharpen the "cut-off".

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 illumination produced on the screen by the driving beam shall be
taken with the same headlamp alignment as for measurements under Paragraphs 6.2.5. to
6.2.7. above; in the case of a headlamp providing a driving beam only, it shall be so
adjusted that the area of maximum illumination is centred on the point of intersection of
Lines hh and vv; such a headlamp need meet only the requirements referred to in
Paragraph 6.3. Where more than one light source is used to provide the driving beam, the
combined functions shall be used to determine the maximum value of the illumination (E ).
6.3.2. The illumination produced on the screen by the driving beam shall meet the following
requirements.
6.3.2.1. The point of intersection (HV) of Lines hh and vv shall be situated within the isolux 80% of
maximum illumination. This maximum value (E ) shall not be less than 48 lux. The
maximum value shall in no circumstances exceed 240 lux; in addition, in the case of a
combined passing and driving headlamp, this maximum value shall not be more than
16 times the illumination measured for the passing beam at Point 75 R (or 75 L).
6.3.2.1.1. The maximum intensity (Ι ) of the driving beam expressed in thousands of candelas shall
be calculated by the formula
Ι = 0.625 E
6.3.2.1.2. The reference mark (Ι' ) of this maximum intensity, referred to in Paragraph 4.2.2.7. above,
shall be obtained by the ratio
Ι
Ι' = =
3
0.208E
This value shall be rounded off to the value 7.5 - 10 - 12.5 -17.5 - 20 - 25 - 27.5 - 30 - 37.5 -
40 - 45 - 50.
6.3.2.2. Starting from Point HV, horizontally to the right and left, the illumination shall be not less
than 24 lux up to a distance of 1.125 m and not less than 6 lux up to a distance of 2.25 m.
6.4. In the case of headlamps with an adjustable reflector the requirements of Paragraphs 6.2.
and 6.3. are applicable for each mounting position indicated according to Paragraph 2.1.3.
For verification the following procedure shall be used:
6.4.1. each applied position is realized on the test goniometer with respect to a line joining the
centre of the light source and Point HV on the aiming screen. The adjustable reflector is
then moved into such a position that the light pattern on the screen corresponds to the
aiming prescriptions of Paragraphs 6.2.1. to 6.2.2.3. and/or 6.3.1;
6.4.2. with the reflector initially fixed according to Paragraph 6.4.1., the headlamp must meet the
relevant photometric requirements of Paragraphs 6.2. and 6.3;

7.2. The filter must be part of the headlamp, and must be attached to it in such a way that the
user cannot remove it either inadvertently or, with ordinary tools, intentionally.
8. GAUGING OF DISCOMFORT
The discomfort caused by the passing beam of headlamps shall be gauged
9. STANDARD (REFERENCE) HEADLAMP
A headlamp shall be deemed to be a standard (reference) headlamp if it
9.1. satisfies the above-mentioned requirements for approval;
9.2. has an effective diameter of not less than 160 mm;
9.3. provides, with a standard (reference) filament lamp, at the various points and in the various
zones referred to in Paragraph 6.2.5, illumination equal to:
9.3.1. not more than 90% of the maximum limits, and
9.3.2. not less than 120% of the minimum limits, prescribed in the table in Paragraph 6.2.5.
10. OBSERVATION CONCERNING COLOUR
Since any approval under this Regulation is granted, pursuant to Paragraph 7.1. above, for
a type of headlamp emitting either white light or selective-yellow light, Article 3 of the
Agreement to which the Regulation is annexed shall not prevent the Contracting Parties
from prohibiting headlamps emitting a beam of white or selective-yellow light on vehicles
registered by them.
C. FURTHER ADMINISTRATIVE PROVISIONS
11. MODIFICATION OF THE HEADLAMP TYPE AND EXTENSION OF APPROVAL
11.1 Every modification of the headlamp type shall be notified to the administrative department
which approved the headlamp type. The said department may then either:
11.1.1 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
11.1.2 Require a further test report from the technical service responsible for conducting the tests.
11.2. Confirmation or refusal of approval, specifying the alterations, shall be communicated by the
procedure specified in Paragraph 4.1.4. above to the Parties to the Agreement which apply
this Regulation.

12.4.5. The competent authority shall strive to obtain a frequency of inspection of once every two
years. However, this is at the discretion of the competent authority and their confidence in
the arrangements for ensuring effective control of the conformity of production. In the case
where negative results are recorded, the competent authority shall ensure that all necessary
steps are taken to re-establish the conformity of production as rapidly as possible.
12.5. Headlamps with apparent defects are disregarded.
12.6. The reference mark is disregarded.
13. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
13.1. The approval granted in respect of a type of headlamp pursuant to this Regulation may be
withdrawn if the requirements are not complied with or if a headlamp bearing the approval
mark does not conform to the type approved.
13.2. If a Contracting Party to the Agreement applying this Regulation withdraws an approval it
has previously granted, it shall forthwith so notify the other Contracting Parties applying this
Regulation by means of a communication form conforming to the model in Annex 1 to this
Regulation.
14. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of headlamp
approved in accordance with this Regulation, he shall so inform the authority which granted
the approval. Upon receiving the relevant communication, that authority shall inform thereof
the other Parties to the 1958 Agreement applying this Regulation by means of a
communication form conforming to the model in Annex 1 to this Regulation.
15. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
The 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 administrative departments 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.

ANNEX 1
COMMUNICATION
(Maximum format A4 (210 × 297 mm))
issued by:
Name of administration
.......................................
.......................................
.......................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a type of headlamp pursuant to Regulation No. 20
Approval No...................................................
Extension No. ................................
1.
Trade name or mark of the device:............................................................................................
2.
Manufacturer's name for the type of device:..............................................................................
3.
Manufacturer's name and address: ...........................................................................................
4.
If applicable, name and address of the manufacturer's representative: ....................................
5.
Submitted for approval on:.........................................................................................................
6.
Technical service responsible for conducting approval tests: ...................................................
7.
Date of test report: .....................................................................................................................
8.
Number of test report: ................................................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
a = 12 mm min.
Figure 1
The headlamp bearing the approval marking shown above is a headlamp approved in the Netherlands
(E4), under approval number 2439, meeting the requirements of this Regulation, as amended by the
02 series of amendments (02), in respect of both the driving beam and the passing beam (HCR) and
which is designed for right-hand traffic only.
The Figure 30 indicates that the maximum intensity of the driving beam is between 86,250 and
101,250 candelas.
Note: The approval number and the 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 the same direction.
The use of Roman numerals as approval numbers should be avoided so as to prevent any confusion
with other symbols.

a = 12 mm min
Figure 4 Figure 5
The headlamp bearing the approval mark shown above is a headlamp incorporating the lens of plastic
material meeting the requirements of this Regulation with respect to the passing beam only, and
designed:
For both traffic systems
For right-hand traffic only

Figure 8 Figure 9
Identification of a headlamp incorporating the lens of plastic material meeting the requirements of
Regulation No. 20:
For both the passing beam and the
driving beam and designed for
right-hand traffic only.
For the passing beam only and
designed for left-hand traffic
only.
The passing lamp filament shall not be lit simultaneously with the driving lamp filament and/or any other
headlamp with which it is reciprocally incorporated.

Model D
Note:
The four examples shown above correspond to a lighting device bearing an approval mark relating to:
A front position lamp approved in accordance with the 01 series of amendments to Regulation No. 7;
A headlamp with a passing beam designed for right-hand and left-hand traffic and a driving beam with a
maximum intensity comprised between 86,250 and 101,250 candelas (as indicated by the number 30),
approved in accordance with the 02 series of amendments to Regulation No. 20 and incorporating a lens
of plastic material;
A front fog lamp approved in accordance with the 02 series of amendments to Regulation No. 19 and
incorporating a lens of plastic material;
A front direction indicator lamp of Category 1a approved in accordance with the 02 series of
amendments to Regulation No. 6.

Example 2
The above example corresponds to the marking of a lens of plastic material used in an assembly of two
headlamps approved in France (E2), consisting of a headlamp emitting a passing beam designed for
both traffic systems and of a driving beam with a maximum intensity comprised between x and y
candelas, meeting the requirements of Regulation No. 20, and of a headlamp emitting a driving beam
with a maximum intensity comprised between w and z candelas, meeting the requirements of
Regulation No. 8 or Regulation No. 20, the maximum intensity of all the driving beams being comprised
between 86,250 and 101,250 candelas.

MEASURING SCREEN
B. Headlamp for Left-hand Traffic
STANDARD EUROPEAN BEAM
(Dimension in mm)

ANNEX 4
TESTS FOR STABILITY OF PHOTOMETRIC PERFORMANCE OF HEADLAMPS IN OPERATION
TESTS ON COMPLETE HEADLAMPS
Once the photometric values have been measured according to the prescriptions of this Regulation, in
the point for E for driving beam and in points HV, 50 R, B 50 L for passing beam (or HV, 50 L, B 50 R
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 those surrounding body parts and lamps which could influence its thermal
dissipation.
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.
1.1 Clean Headlamp
The headlamp shall be operated for 12 hours as described in sub-paragraph 1.1.1. and
checked as prescribed in sub-paragraph 1.1.2.
1.1.1 Test Procedure
The headlamp shall be operated for a period according to the specified time, so that:
1.1.1.1 (a) In the case where only one lighting function (driving or passing beam) is to be
approved, the corresponding filament is lit for the prescribed time, ;
(b)
In the case of a reciprocally incorporated passing lamp and driving lamp (dual
filament lamp or two filament lamps):
If the applicant declares that the headlamp is to be used with a single filament lit,
time, the test shall be carried out in accordance with this condition, activating
specified function successively for half the time specified in Paragraph 1.1.;
at a
each
In all other cases,
specified is reached:
, the headlamp shall be subjected to the following cycle until the time
15 minutes, passing-beam filament lit
5 minutes, all filaments lit
(c)
In the case of grouped lighting functions all the individual functions shall be lit
simultaneously for the time specified for individual lighting functions (a), also taking
into account the use of reciprocally incorporated lighting functions (b), according to
the manufacturer's specifications.

1.2.1 Preparation of the Headlamp
1.2.1.1 Test Mixture
For headlamp with the outside lens in glass:
The mixture of water and a polluting agent to be applied to the headlamp shall be composed
of:
9 parts by weight of silica sand with a particle size of 0-100 μm,
1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 μm,
0.2 parts by weight of NaCMC and
an appropriate quantity of distilled water, with a conductivity of ≤ 1 mS/m.
The mixture must not be more than 14 days old.
1.2.1.1.2 For headlamp with outside lens in plastic material:
The mixture of water and polluting agent to be applied to the headlamp shall be composed
of:
9 parts by weight of silica sand with a particle size of 0-100 μm,
1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 μm,
0.2 part by weight of NaCMC ,
13 parts by weight of distilled water with a conductivity of ≤ 1 mS/m, and
2 ± 1 parts by weight of surface-actant
The mixture must not be more than 14 days old.
1.2.1.2 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 illumination value
has dropped to 15-20% of the values measured for each following point under the
conditions described in this Annex:
Point of E in passing beam/driving beam and in driving beam only,
50 R and 50 V
for a passing lamp only, designed for right-hand traffic,
50 L and 50 V
for a passing lamp only, designed for left-hand traffic.

2.2.2 However, if this value is more than 1.0 mrad but not more than 1.5 mrad
(1.0 mrad < Δ r ≤ 1.5 mrad) a second headlamp shall be tested as described in
Paragraph 2.1. after being subjected three consecutive times to the cycle as described
below, in order to stabilise the position of mechanical parts of the headlamp on a base
representative of the correct installation on the vehicle:
Operation of the passing beam for one hour, (the voltage shall be adjusted as specified in
Paragraph 1.1.1.2.)
Period of rest for one hour.
The headlamp type shall be considered as acceptable if the mean value of the absolute
values Δ r measured on the first sample and Δ r measured on the second sample is not
more than 1.0 mrad.
Δr + Δr
2
≤ 1 mrad

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 as acceptable if Δr does not exceed 1.5 mrad.
If this value exceeds 1.5 mrad but is not more than 2.0 mrad, a second headlamp shall be
subjected to the test after which the mean of the absolute values recorded on both samples
shall not exceed 1.5 mrad.
1.4. The chromaticity coordinates shall be complied with when the headlamp is equipped with a
filament lamp set to Standard A colour temperature.
The photometric performance of a headlamp emitting selective yellow light when equipped
with a colourless filament lamp shall be the values contained in this Regulation multiplied by
0.84.
2. MINIMUM REQUIREMENTS FOR VERIFICATION OF CONFORMITY BY THE
MANUFACTURER
For each type of headlamp the holder of the approval mark shall carry out at least the
following tests, at appropriate intervals. The tests shall be carried out in accordance with
the provisions of this Regulation.
If any sampling shows non-conformity with regard to the type of test concerned, further
samples shall be taken and tested. The manufacturer shall take steps to ensure the
conformity of the production concerned.
2.1. Nature of Tests
Tests of conformity in this Regulation shall cover the photometric characteristics and the
verification of the change in vertical position of the cut-off line under the influence of heat.
2.2. Methods used in Tests
2.2.1. Tests shall generally be carried out in accordance with the methods set out in this
Regulation.
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 calibration 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.

ANNEX 6
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 Paragraph 2.2.4. of this Regulation shall satisfy the
specifications indicated in Paragraphs 2.1 to 2.5 below.
1.2. The two samples of complete lamps supplied pursuant to Paragraph 2.2.3. of this
Regulation and incorporating lenses of plastic material shall, with regard to the lens
material, satisfy the specifications indicated in Paragraph 2.6. 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.
2. TESTS
2.1. Resistance to Temperature Changes
2.1.1. Tests
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;
Before this test, the samples shall be kept at 23° C ± 5° C and 60-75% RH for at least four
hours.
Note:
The periods of one hour at 23° C ± 5° C shall include the periods of transition from
one temperature to another which are needed in order to avoid thermal shock
effects.

2.2.2.2. Application of the Test Mixture
2.2.2.3. Cleaning
2.2.3. Results
Soak a piece of cotton cloth (as per ISO 105) until saturation with the mixture defined in
Paragraph 2.2.2.1. above and, within 10 seconds, apply it for 10 minutes to the outer face of
the sample at a pressure of 50 N/cm , corresponding to an effort of 100 N applied on a test
surface of 14 × 14 mm.
During this 10-minute 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
prescribed.
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)
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.
2.2.3.1. 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
Δ t =
T
− T
T
,
measured on the three samples according to the procedure described in Appendix 2 to this
Annex shall not exceed 0.020 (Δ t ≤ 0.020).
2.2.3.2. 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
Δ d =
T
− T
T
,
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)

2.4.2. Results
After this test, the variations:
in transmission:
Δ t =
T
= T
T
,
and in diffusion:
Δ d =
T
− T
T
,
shall be measured according to the procedure described in Appendix 2 in the area specified
in Paragraph 2.2.4.1.1. of this Regulation. The mean value of the three samples shall be
such that:
Δ t ≤ 0.100;
Δ d ≤ 0.050.
2.5. Test of Adherence of Coatings, if any
2.5.1. Preparation of the Sample
A surface of 20 mm × 20 mm in area of the coating of a lens shall be cut with a razor blade
or a needle into a grid of squares approximately 2 mm × 2 mm. The pressure on the blade
or needle shall be sufficient to cut at least the coating.
2.5.2. Description of the Test
2.5.3. Results
Use an adhesive tape with a force adhesion of 2 N/(cm of width) ± 20% measured under the
standardized conditions specified in Appendix 4 to this Annex. This adhesive tape, which
shall be at least 25 mm 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 1.5 m/s ± 0.2 m/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.

ANNEX 6 - 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)
Samples Lenses or samples of material Lenses
Tests 1 2 3 4 5 6 7 8 9 10 11 12 13
1.1. Limited photometry
(A.6, Para. 2.1.2.) x x x
1.1.1. Temperature change
(A.6, Para.2.1.1.)
x
x
x
1.1.2. Limited photometry
(A.6, Para.2.1.2.)
x
x
x
1.2.1. Transmission
measurement
x
x
x
x
x
x
x
x
x
1.2.2. Diffusion measurement x x x x x x
1.3. Atmospheric agents
(A.6, Para. 2.2.1.) x x x
1.3.1. Transmission
measurement
x
x
x
1.4. Chemical agents
(A.6, Para. 2.2.2.) x x x
1.4.1. Diffusion measurement x x x
1.5. Detergents
(A.6, Para. 2.3.1.) x x x
1.6. Hydrocarbons
(A.6, Para. 2.3.2.) x x x
1.6.1. Transmission
measurement
x
x
x
1.7. Deterioration
(A.6, Para. 2.4.1.) x x x
1.7.1. Transmission
measurement
x
x
x
1.7.2. Diffusion measurement x x x
1.8. Adherence
(A.6, Para. 2.5.)
x

ANNEX 6 - 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 6 mm 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 β2 = 14°.
An annular diaphragm D with angles
α
2
α
= 1°
and
2
= 12
is
placed in an image focal plane of the lens L .
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
position.
The distance L D and the focal length F
of D completely covers the receiver R.
of the lens L shall be so chosen that the image
When the initial incident flux is referred to 1,000 units, the absolute precision of each
reading shall be better than 1 unit.
.

ANNEX 6 - APPENDIX 3
SPRAY TESTING METHOD
1. TEST EQUIPMENT
1.1. Spray Gun
The spray gun used shall be equipped with a nozzle 1.3 mm in diameter allowing a liquid
flow rate of 0.24 ± 0.02 1/minute at an operating pressure of 6.0 bars - 0, + 0.5 bar.
Under these operation conditions the fan pattern obtained shall be 170 mm ± 50 mm in
diameter on the surface exposed to deterioration, at a distance of 380 mm ± 10 mm from
the nozzle.
1.2. Test Mixture
2. TEST
The test mixture shall be composed of:
Silica sand of hardness 7 on the Mohr scale, with a grain size between 0 and 0.2 mm 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 = = 0.250 ± 0.0025
T
Several reference samples may be used to check that the whole surface to be tested has
deteriorated homogeneously.

6. RESULTS
The five values obtained shall be arranged in order and the median value taken as the result
of the measurement. This value shall be expressed in Newton’s per centimetre of width of
the tape.

1.3. The chromaticity coordinates shall be complied with when the headlamp is equipped with a
filament lamp set to Standard A colour temperature.
The photometric performance of a headlamp emitting selective yellow light when equipped
with a colourless filament lamp shall be multiplied by 0.84.
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:
2.1.1.1. Sample A
2.1.1.2. Sample B
A1:
one headlamp
0%
one headlamp not more than
20%
A2:
both headlamps more than
0%
but not more than
20%
go to Sample B
B1: both headlamps 0%
2.1.2. or if the conditions of Paragraph 1.2.2. for Sample A are fulfilled.
2.2. The Conformity is Contested
2.2.1. 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:
2.2.1.1. Sample A
A3:
one headlamp not more than
20%
one headlamp more than
20%
but not more than
30%

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:
3.1.1.1. Sample C
3.1.1.2. Sample D
C1:
one headlamp
0%
one headlamp not more than
20%
C2:
both headlamps more than
0%
but not more than
20%
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:
3.2.1.1. Sample D
D2:
in the case of C2
one headlamp more than
0%
but not more than
20%
one headlamp not more than
20%
3.2.1.2. or if the conditions of Paragraph 1.2.2. for Sample C are not fulfilled:

Figure 1
Headlamps - Asymmetrical Passing/Driving Beam - Halogen Filament Lamps H4.