Regulation No. 50-00

Name:Regulation No. 50-00
Description:Lamps - Front Position, Stop, Direction Indicators, Rear Registration Plate.
Official Title:Uniform Provisions Concerning the Approval of: Front Position Lamps, Rear Position Lamps, Stop Lamps, Direction Indicators and Rear-registration-plate Illuminating Devices for Vehicles of Category L.
Country:ECE - United Nations
Date of Issue:1983-01-11
Amendment Level:00 Series, Supplement 18
Number of Pages:27
Vehicle Types:Component, Motorcycle
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:

regulation, light, approval, lamps, lamp, device, supplement, position, force, date, entry, source, direction, amendments, series, category, case, rear, paragraph, annex, type, devices, interdependent, intensity, luminous, front, part, requirements, stop, horizontal, system, angle, minimum, distribution, sources, approved, filament, number, emitted, granted, mark, illuminating, photometric, applying, reference, measurements, application, vehicle, contracting, surface

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
) Rev.1/Add.49/Rev.3/Amend.2
E/ECE/TRANS/505 )
October 28, 2016
STATUS OF UNITED NATIONS REGULATION
ECE 50-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
FRONT POSITION LAMPS, REAR POSITION LAMPS, STOP LAMPS, DIRECTION
INDICATORS AND REAR-REGISTRATION-PLATE ILLUMINATING DEVICES FOR
VEHICLES OF CATEGORY L
Incorporating:
00 series of amendments
Date of Entry into Force: 01.06.82
Corr. 1 to the 00 series of amendments
Dated: 22.07.85
Corr. 2 to the 00 series of amendments
Dated: 01.07.92
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 05.05.91
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 24.09.92
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 29.12.00
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 04.12.01
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 19.08.02
Corr. 1 to Supplement 5 to the 00 series of amendments
Dated: 12.11.03
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 16.07.03
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 26.02.04
Corr. 1 to Supplement 7 to the 00 series of amendments
Dated: 26.02.04
Supplement 8 to the 00 series of amendments
Date of Entry into Force: 09.11.05
Supplement 9 to the 00 series of amendments
Date of Entry into Force: 04.07.06
Supplement 10 to the 00 series of amendments
Date of Entry into Force: 02.02.07
Supplement 11 to the 00 series of amendments
Date of Entry into Force: 11.07.08
Supplement 12 to the 00 series of amendments including erratum
Date of Entry into Force: 15.10.08
Supplement 13 to the 00 series of amendments
Date of Entry into Force: 09.12.10
Supplement 14 to the 00 series of amendments
Date of Entry into Force: 23.06.11
Supplement 15 to the 00 series of amendments
Date of Entry into Force: 28.10.11
Corr. 1 to Revision 2 to the 00 series of amendments
Dated: 14.03.12
Supplement 16 to the 00 series of amendments
Date of Entry into Force: 15.07.13
Supplement 17 to the 00 series of amendments
Date of Entry into Force: 08.10.15
Supplement 18 to the 00 series of amendments
Date of Entry into Force: 08.10.16

REGULATION NO. 50-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF FRONT POSITION LAMPS, REAR
POSITION LAMPS, STOP LAMPS, DIRECTION INDICATORS AND REAR-REGISTRATION-PLATE
ILLUMINATING DEVICES FOR VEHICLES OF CATEGORY L
REGULATION
CONTENTS
1.
Scope
2.
Definitions
3.
Application for Approval
4.
Markings
5.
Approval
6.
General Specifications
7.
Intensity of Light Emitted
8.
Test Procedure
9.
Colour of Light Emitted
10.
Conformity of Production
11.
Penalties for Non-conformity of Production
12.
Production Definitively Discontinued
13.
Names and Addresses of Technical Services Responsible for Conducting Approval Tests,
and of Type Approval Authorities
14.
Transitional Provisions
ANNEXES
Annex 1 –
Annex 2 –
Annex 3 –
Annex 4 –
Annex 5 –
Minimum Horizontal (H) and Minimum Vertical (V) Angles for Spatial Lamp Distribution
Communication
Examples of Arrangements of the Approval Marks
Photometric Measurements
Photometric Measurements for the Rear Registration Plate Illuminating Device

3. APPLICATION FOR APPROVAL
3.1. The application for approval shall be submitted by the holder of the trade name or mark or
by his duly accredited representative. It shall specify:
3.1.1. The purpose or purposes for which the device submitted for approval is intended;
3.1.2. In the case of a front position lamp an indication whether it is intended to emit white or
amber light;
3.1.3. In the case of a direction indicator: the category.
3.1.4. At the choice of the applicant, that the device may be installed on the vehicle with different
inclinations of the reference axis in respect to the vehicle reference planes and to the
ground or rotate around its reference axis or, in the case of a rear registration plate lamp,
that the device may be fitted in more than one or a field of positions in relation to the space
to be occupied by the registration plate; these different conditions of installation (or different
positions) shall be indicated in the communication form.
3.2. For each type of device, the application shall be accompanied by:
3.2.1. Drawings, in triplicate, in sufficient detail to permit identification of the type of the device and
showing the following:
(a)
(b)
(c)
(d)
In what geometrical position(s) the device may be mounted on the vehicle; the axis of
observation to be taken as the axis of reference in the tests (horizontal angle H = 0°,
vertical angle V = 0°); and the point to be taken as the centre of reference in the said
tests;
The geometrical conditions of installation of the device(s) that meet(s) the
requirements of Paragraph 7.;
In the case of an interdependent lamp system, the interdependent lamp or the
combination of interdependent lamps that fulfil the requirements of Paragraphs 6.7.,
7.1. and of Annex 4 to this Regulation;
The position intended for the approval number and the additional symbols in relation
to the circle of the approval mark.
3.2.2. A brief technical description stating, in particular, with the exception of lamps with
non-replaceable light sources:
(a)
(b)
(c)
The category or categories of filament lamp(s) prescribed; this filament lamp category
shall be one of those contained in Regulation No. 37 and its series of amendments in
force at the time of application for type approval; and/or
The category or categories of LED light source(s) prescribed; this LED light source
category shall be one of those contained in Regulation No. 128 and its series of
amendments in force at the time of application for type approval; and/or
The light source module specific identification code;
3.2.3. Two devices.

5.4. Notice of approval or of refusal of approval of a type of device pursuant to this Regulation
shall be communicated to the Parties to the Agreement applying this Regulation, by means
of a form conforming to the model shown in Annex 2 to this Regulation and of an attached
drawing supplied by the applicant for approval, in a format not exceeding A4 (210 × 297mm)
and, if possible, on a scale of 1:1.
5.5. Each device conforming to a type approved under this Regulation shall bear, in the space
referred to in Paragraph 4.2. above, in addition to the markings referred to in
Paragraphs 4.1. and 4.3, an international approval mark consisting of:
5.5.1. A circle enclosing the Letter "E" followed by the distinguishing number of the country which
was granted the approval; and
5.5.2. The number of this Regulation, followed by the Letter "R", a dash and the approval number;
5.5.3. In the general case of a direction indicator: a number indicating the Category 11, 11a, 11b,
11c or 12 close to the circle according to Paragraph 5.5.1. and on the opposite side to the
approval number;
5.5.4. In the case of a direction indicator, which does on one side not attain the minimum luminous
intensity prescribed up to an angle of H = 80° according to Paragraph 7.7.1.: a horizontal
arrow, the tip of which is oriented to the side where the minimum luminous intensity
according to Paragraph 7.7.1. is complied with up to an angle of at least 80°.
5.5.5. On front or rear position lamps of which the visibility angles are asymmetrical with regard to
the reference axis in a horizontal direction, an arrow pointing towards the side on which the
photometric specifications are met up to an angle of 80°H;
5.5.6. On devices with reduced light distribution in conformity to Paragraph 2.3. in Annex 4 to this
Regulation a vertical arrow starting from a horizontal segment and directed downwards.
5.5.7. On interdependent lamps, which may be used as part of an interdependent lamp system,
the additional symbol shall be marked as follows:
(a)
(b)
(c)
For a front position lamp "MAY";
For a rear position lamp "MRY";
For a stop lamp "MSY".
5.6. Where a device has been found to comply with the requirements of several Regulations, a
single approval mark may be applied comprising a circle according to Paragraph 5.5.1., the
approval numbers, and the additional symbols appropriate to each Regulation under which
approval has been granted. The size of the components of this single approval mark shall
not be less than the minimum size required for the smallest of the individual marks under a
Regulation, under which approval has been granted.

6.5. In the case of replaceable filament lamp(s):
6.5.1. Any category or categories of filament lamp(s) approved according to Regulation No. 37
may be used, 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 approval.
6.5.2. The design of the device shall be such that the filament lamp can be fixed in no other
position but the correct one.
6.5.3. The filament lamp holder shall conform to the characteristics given in
IEC Publication 60061. The holder data sheet relevant to the category of filament lamp
used, applies.
6.6. Only front and rear position lamps and stop lamps may be constructed as an interdependent
lamp system.
6.7. An interdependent lamp system shall meet the requirements when all its interdependent
lamps are operated together. However, if the interdependent lamp system providing the rear
position lamp function is partly mounted on the fixed component and partly mounted on a
movable component, the interdependent lamp(s) specified by the applicant shall meet the
outboard geometric visibility, colorimetric and photometric requirement, at all fixed positions
of the movable component(s). In this case, the inboard geometric visibility requirement is
deemed to be satisfied if this (these) interdependent lamp(s) still conform to the photometric
values prescribed in the field of light distribution for the approval of the device, at all fixed
positions of the moveable component(s).
6.8. For direction indicator lamps of Categories 11, 11a, 11b, 11c or 12 the flash may be
produced by sequential activation of their light sources if the following conditions are met:
(a)
(b)
(c)
(d)
(e)
Each light source, after its activation, shall remain lit until the end of the ON cycle;
The sequence of activation of the light sources shall proceed in a uniform progressive
manner from inboard towards the outboard edge of the apparent surface;
It shall be one continuous line without repeat alternation in the vertical direction (e.g.
no waves);
The variation shall finish no more than 200ms after the beginning of the ON cycle;
For the orthogonal projection in the direction of the axis of reference of a rectangle,
circumscribing the apparent surface of the direction indicator shall have its longer
sides parallel to the H-plane, the ratio of the horizontal to the vertical sides shall not
be less than 1.7.
Compliance with the conditions mentioned above shall be verified in flashing mode

7.7. Moreover,
7.7.1. Throughout the fields defined in Annex 1, the intensity of the light emitted shall not be less
than 0.05cd for position lamps and not less than 0.3cd for stop lamps and direction
indicators;
7.7.2. If a position lamp is grouped or reciprocally incorporated with a stop lamp, the ratio between
the luminous intensities actually measured of the two lamps when turned on simultaneously
and the intensity of the rear position lamp when turned on alone shall be at least 5:1 to the
eleven measuring points defined in Annex 4 and situated in the field delimited by straight
vertical lines passing through 0°V/±10°H and the straight horizontal lines passing through
±5°V/0°H of the light distribution table.
If the rear position lamp or the stop lamp or both contain more than one light source and are
considered as a single lamp, as defined in Paragraph 7.5.2. above, the values to be
considered are those obtained with all light sources in operation.
7.7.3. The provisions of Paragraph 2.2. of Annex 4 to this Regulation on local variations of
intensity shall be observed.
7.8. In general the intensities shall be measured with the light source(s) continuously alight.
In the case of lamps intended to work intermittently, precaution shall be taken to avoid
overheating of the device. Depending on the construction of the device, for example, the
use of light-emitting diodes (LED) or the need to take precautions to avoid overheating, it is
allowed to measure the lamps in flashing mode.
This must be achieved by switching with a frequency of f = 1.5 ± 0.5Hz with the pulse width
greater than 0.3s, measured at 95% peak light intensity.
In the case of replaceable filament lamps, the filament lamps shall be operated at reference
luminous flux during on time. In all other cases the voltage as required in Paragraph 8.1
shall be switched with a rise time and fall time shorter than 0.01s; no overshoot is allowed.
In the case of measurements taken in flashing mode the reported luminous intensity shall be
represented by the maximum intensity.
7.9. Annex 4, to which reference is made in Paragraph 7.5. above, gives particulars of the
methods of measurement to be used.
7.10. The rear registration plate illuminating device shall comply with the specifications indicated
in Annex 5 to this Regulation.

10. CONFORMITY OF PRODUCTION
10.1. Every device bearing an approval mark as prescribed under this Regulation shall conform to
the type approved and shall comply with the requirements of this Regulation. However, in
the case of a device picked at random from series production, the requirements as to the
respectively minimum and maximum intensities of the light emitted (measured with a
standard light source as referred to in Paragraph 8 above) shall be at least 80% of the
minimum values specified and not exceed 120% of the maximum values allowed.
11. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
11.1. The approval granted in respect of a device pursuant to this Regulation may be withdrawn if
the foregoing conditions are not observed.
11.2. 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 copy of the approval form bearing at the end, in large letters, the
signed and dated annotation. "APPROVAL WITHDRAWN".
12. PRODUCTION DEFINITIVELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a device approved in
accordance with this Regulation, he shall so inform the Type Approval Authority, which
granted the approval. Upon receiving the relevant communication, that Authority shall inform
thereof the other Parties to the Agreement which apply this Regulation by means of a copy
of the approval form bearing at the end, in large letters, the signed and dated annotation
"PRODUCTION DISCONTINUED".
13. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF TYPE APPROVAL AUTHORITIES
The Contracting Parties to the Agreement which apply 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 refusal or withdrawal of approval issued
in other countries, are to be sent.

ANNEX 1
MINIMUM HORIZONTAL (H) AND MINIMUM VERTICAL (V)
ANGLES FOR SPATIAL LIGHT DISTRIBUTION
1. FRONT POSITION LAMPS
V = +15° / -10°
However, in the case where a device is intended to be installed with its H Plane at a
mounting height less than 750mm above the ground, the angle of 10° below the horizontal
may be reduced to 5°.
Front position lamps (for a pair of lamps)
V = +15° / -10°
However, in the case where a device is intended to be installed with its H Plane at a
mounting height less than 750mm above the ground, the angle of 10° below the horizontal
may be reduced to 5°.

3. DIRECTION INDICATORS OF CATEGORIES 11, 11a, 11b, 11c AND 12
V = ±15°
However, in the case where a device is intended to be installed with its H Plane at a
mounting height less than 750mm above the ground, the angle of 15° below the horizontal
may be reduced to 5°.
Minimum horizontal angles of light distribution in space:
Categories 11, 11a, 11b and 11c: direction indicators for the front of the vehicle;
Category 11:
Category 11a:
Category 11b:
Category 11c:
for use at a distance not less than 75mm from the
passing-beam headlamp;
for use at a distance not less than 40mm from the
passing-beam headlamp;
for use at a distance not less than 20mm from the
passing-beam headlamp;
for use at a distance less than 20mm from the
passing-beam headlamp.

ANNEX 2
(Maximum format: A4 (210 × 297mm))
COMMUNICATION
issued by:
Name of administration:
...............................................
...............................................
...............................................
concerning
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITIVELY DISCONTINUED
of a type of front position lamps, rear position lamps, stop lamps, direction indicators and
rear-registration-plate illuminating devices for mopeds, motorcycles and vehicles treated as such
pursuant to Regulation No. 50
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 report issued by that service: .......................................................................................
8. Number of report issued by that service: ..................................................................................

13. Place: ........................................................................................................................................
14. Date: ..........................................................................................................................................
15. Signature: ..................................................................................................................................
16. The list of documents deposited with the Type Approval Authority which has granted
approval is annexed to this communication and may be obtained on request.

Interdependent Lamps
Marking of an interdependent lamp comprising
part of an interdependent lamp system
providing:
A rear direction indicator lamp (Category 12)
approved in accordance with the requirements
of Regulation No. 50;
A rear position lamp (MRY) approved as an
interdependent lamp forming part of an
interdependent lamp system in accordance with
the requirements of Regulation No. 50;
A stop-lamp (MSY) approved as an
interdependent
lamp forming part of an interdependent lamp
system in accordance with the requirements of
Regulation No. 50.
Marking of an interdependent lamp comprising
part of an interdependent lamp system
providing:
A rear position lamp (MRY) approved as an
interdependent lamp forming part of an
interdependent lamp system in accordance with
the requirements of Regulation No. 50;
A stop-lamp (MSY) approved as an
interdependent lamp forming part of an
interdependent lamp system in accordance with
the requirements of Regulation No. 50.

3. TEST CONDITIONS
The photometric performance shall be checked:
3.1. For non-replaceable light sources (filament lamps and others):
With the light sources present in the lamp, in accordance with the relevant subparagraph of
Paragraph 8.1 of this Regulation.
3.2. For replaceable light sources:
When equipped with light sources at 6.75V, 13.5V or 28.0V the luminous intensity
(luminance) values produced shall be corrected.
For filament lamps the correction factor is the ratio between the reference luminous flux and
the mean value of the luminous flux found at the voltage applied (6.75V or 13.5V).
For LED light sources the correction factor is the ratio between the objective luminous flux
and the mean value of the luminous flux found at the voltage applied (6.75V or 13.5V).
The actual luminous fluxes of each light source used shall not deviate more than ±5% from
the mean value.
Alternatively and in the case of filament lamps only, a standard filament lamp may be used
in turn, in each of the individual positions, operated at its reference flux, the individual
measurements in each position being added together.
3.3. For any signalling lamps, except those equipped with filament lamps, the luminous
intensities measured after 1min and after 30min of operation shall comply with the minimum
and maximum requirements; direction indicators shall be operated in the flashing mode
(f = 1.5Hz, duty factor 50%). The luminous intensity distribution after 1min of operation can
be calculated from the luminous intensity distribution after 30min of operation by applying at
each test point the ratio of luminous intensities measured at HV after 1min and after 30min
of operation.

5. PHOTOMETRIC CHARACTERISTICS
At each of the points of measurement shown below, the luminance B shall be not less than
2cd/m .
Figure 1 Figure 2
Points of Measurement for Category 1 Points of Measurement for Category 2
The gradient of the luminance between the values B and B , measured at any two points 1 and 2
selected from among those mentioned above, shall not exceed 2 x B /cm, B being the minimum
luminance measured at the various points, that is to say
B − B
≤ 2 x B
distance 1−
2 in cm
/ cm
Lamps - Front Position, Stop, Direction Indicators, Rear Registration Plate.