Regulation No. 38-00

Name:Regulation No. 38-00
Description:Rear Fog Lamps.
Official Title:Uniform Provisions Concerning the Approval of: Rear Fog Lamps for Power-driven Vehicles and their Trailers.
Country:ECE - United Nations
Date of Issue:1978-07-07
Amendment Level:00 Series, Supplement 17
Number of Pages:26
Vehicle Types:Agricultural Tractor, Bus, Car, Component, Heavy Truck, Light Truck, Motorcycle, Trailer
Subject Categories:Lighting and Light Signalling Equipment
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Keywords:

approval, regulation, lamp, light, lamps, intensity, source, luminous, amendments, type, rear, force, series, control, date, supplement, fog, requirements, entry, variable, mark, approved, annex, case, number, device, granted, conformity, accordance, original, version, test, voltage, paragraph, manufacturer, production, category, photometric, filament, minimum, tests, reference, module, time, measurements, application, marking, part, incorporated, sampling

Text Extract:

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E/ECE/324
) Rev.1/Add.37/Rev.3/Amend.1
E/ECE/TRANS/505 )
November 9, 2015
STATUS OF UNITED NATIONS REGULATION
ECE 38-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
REAR FOG LAMPS FOR POWER-DRIVEN VEHICLES AND THEIR TRAILERS
Incorporating:
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 03.09.97
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 28.12.00
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 20.08.02
Supplement 8 to the 00 series of amendments
Date of Entry into Force: 16.07.03
Supplement 9 to the 00 series of amendments
Date of Entry into Force: 26.02.04
Corr. 1 to Supplement 9 to the 00 series of amendments
Dated: 26.02.04
Supplement 10 to the 00 series of amendments
Date of Entry into Force: 09.11.05
Supplement 11 to the 00 series of amendments
Date of Entry into Force: 04.07.06
Supplement 12 to the 00 series of amendments
Date of Entry into Force: 11.06.07
Corr. 1 of 30.04.09 to Supplement 12 to the 00 series of amendments Date of Entry into Force: 10.03.09
Supplement 13 to the 00 series of amendments
Date of Entry into Force: 11.07.08
Supplement 14 to the 00 series of amendments
Date of Entry into Force: 15.10.08
Supplement 15 to the 00 series of amendments
Date of Entry into Force: 09.12.10
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

REGULATION No. 38
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF REAR
FOG LAMPS FOR POWER-DRIVEN VEHICLES AND THEIR TRAILERS
CONTENTS
REGULATION
Scope
1.
Definitions
2.
Application for Approval
3.
Markings
4.
Approval
5.
General Specifications
6.
Intensity of Light Emitted
7.
Test Procedure
8.
Heat Resistance Test
9.
Colour of Light Emitted
10.
Conformity of Production
11.
Penalties for Non-conformity of Production
12.
Production Definitely Discontinued
13.
Names and Addresses of Technical Services Responsible for Conducting Approval Tests, and of
Type Approval Authorities
ANNEXES
Annex 1
Annex 2
Annex 3
Annex 4
Annex 5
– Communication
– Arrangements of Approval Marks
– Photometric Measurements
– Minimum Requirements for Conformity of Production Control Procedures
– Minimum Requirements for Sampling by an Inspector

2. APPLICATION FOR APPROVAL
2.1 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, whether the device produces steady
luminous intensity or whether the device produces variable luminous intensity.
At the choice of the applicant, it will specify 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; these different conditions of installation shall
be indicated in the communication form.
2.2 For each type of rear fog lamp, the application shall be accompanied by:
2.2.1 Drawings (three copies) in sufficient detail to permit identification of the type of the rear fog
lamp and showing geometrically the position(s) in which the rear fog lamp may be fitted to 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;
2.2.2 A brief technical description stating, in particular, with the exception of lamps with
non-replaceable light sources:
(a)
(b)
(c)
(d)
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.
For a rear fog lamp of Category F2, a concise description of the variable intensity
control.
2.2.3 Two samples; if the rear fog lamp cannot be mounted indiscriminately on either side of the
vehicle, the two samples submitted may be identical and be suitable for mounting only on the
right or only on the left side of the vehicle. For a rear fog lamp of category F2, the application
shall also be accompanied by the variable intensity control or a generator providing the same
signal(s).
3. MARKINGS
The samples of a type of rear fog lamp submitted for approval shall:
3.1 Bear the trade name or mark of the applicant; this marking must be clearly legible and be
indelible;
3.2 With the exception of lamps with non-replaceable light sources bear a clearly legible and
indelible marking indicating:
(a)
(b)
The category or categories of filament lamp prescribed; and/or
The light source module specific identification code.

4.3 Every rear fog lamp conforming to a type approved under this Regulation shall bear in the
space referred to in Paragraph 3.3. above, in addition to the mark and the particulars
prescribed in Paragraphs 3.1 and 3.2. above:
4.3.1 An international approval mark consisting of;
4.3.1.1 A circle surrounding the Letter "E" followed by the distinguishing number of the country which
has granted approval;
4.3.1.2 An approval number;
4.3.2 The additional Symbol "F" followed by the Figure "1" when the device produces steady
luminous intensity and by the Figure "2" when the device produces variable luminous
intensity.
4.3.3 The first two digits of the approval number which indicate the most recent series of
amendments to this Regulation may be placed in the vicinity of the additional Symbol "F".
4.4 The mark and the symbol referred to in Paragraphs 4.3.1. and 4.3.2. shall be indelible and
shall be clearly legible even when the rear fog lamp is fitted to the vehicle.
4.5 Independent Lamps
If different types of lamps complying with the requirements of several Regulations, uses the
same outer lens having the same or different colour, 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 lamp, provided that:
4.5.1 It is visible after their installation.
4.5.2 The identification symbol for each lamp appropriate to each Regulation under which approval
has been granted, together with the corresponding series of amendments incorporating the
most recent major technical amendments to the Regulation at the time of issue of the
approval and if necessary, the required arrow shall be marked.
4.5.3 The size of the components of a single approval mark shall not be less than the minimum size
required for the smallest of the individual marks under which approval has been granted.
4.5.4 The main body of the lamp shall include the space described in Paragraph 3.3 above and
shall bear the approval mark of the actual function(s).
4.5.5 Model E in Annex 2 to this Regulation gives examples of an approval mark with the
above-mentioned additional symbols.

5. GENERAL SPECIFICATIONS
5.1 Each sample shall conform to the specifications set forth in the Paragraphs below.
5.2 Rear fog lamps shall be so designed and constructed that in normal use, despite the vibration
to which they may then be subjected, they continue to function satisfactorily and retain the
characteristics prescribed by this Regulation.
5.3. In the case of light source modules, it shall be checked that:
5.3.1. The design of the light source module(s) shall be such as:
(a)
(b)
That each light source module can only be fitted in no other position than the
designated and correct one and can only be removed with the use of tool(s);
If there are more than one light source module used in the housing for a device, light
source modules having different characteristics can not be interchanged within the
same lamp housing.
5.3.2. The light source module(s) shall be tamperproof.
5.3.3. A light source module shall be so designed that regardless of the use of tool(s), it shall not be
mechanically interchangeable with any replaceable approved light source.
5.4. In the case of failure of the variable intensity control regulating the variable luminous intensity
of a rear fog lamp of Category F2 emitting more than the maximum value of Category F or F1,
requirements of steady luminous intensity of Category F or F1 shall be fulfilled automatically.
5.5. In the case of replaceable filament lamp(s):
5.5.1. Any category or categories of light source(s) approved according to Regulation No. 37 and/or
Regulation No. 128 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 or in Regulation No. 128 and its series of amendments in force at the time of
application for type approval.
5.5.2. The design of the device shall be such that the filament lamp can be fixed in no other position
but the correct one.
5.5.3. The light source holder shall conform to the characteristics given in IEC Publication 60061.
The holder data sheet relevant to the category of light source used, applies.
6. INTENSITY OF LIGHT EMITTED
6.1 The intensity of the light emitted by each of the two samples shall be not less than the minima
and not greater than the maxima specified below and shall be measured in relation to the axis
of reference in the directions shown below (expressed in degrees of angle with the axis of
reference).
6.2 The intensity along the H and V axes, between 10° to the left and 10° to the right and
between 5° up and 5° down, shall not be less than 150cd.

7.2. The test laboratory shall require from the manufacturer the light source control gear or a
variable intensity control needed to supply the light source and the applicable functions.
7.3. However in the case of a rear fog lamp of Category F2 operated by a variable intensity control
to obtain variable luminous intensity, photometric measurements shall be performed
according to the applicant's description.
7.4. The voltage to be applied to the lamp shall be noted in the communication for in Annex 1 of
this Regulation.
7.5. For any lamp except those equipped with filament lamps, the luminous intensities, measured
after one minute and after 30min of operation, shall comply with the minimum and maximum
requirements. The luminous intensity distribution after one minute 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 one minute and after 30min of
operation.
7.6. The limits of the apparent surface in the direction of the reference axis of a light-signalling
device shall be determined.
8. HEAT RESISTANCE TEST
8.1 The lamp must be subjected to a one-hour test of continuous operation following a warm-up
period of 20min. The ambient temperature shall be 23°C ± 5°. The lamp used shall be a lamp
of the category prescribed for the lamp, and shall be supplied with a current at a voltage such
that it gives the specified average power at the corresponding test voltage.
8.2 Where only the maximum power is specified, the test shall be carried out by regulating the
voltage to obtain a power equal to 90% of the specified power. The specified average or
maximum power referred to above shall in all cases be chosen from the voltage range of 6,
12 or 24V at which it reaches the highest value.
8.3. In the case of light sources operated by an electronic control gear to obtain variable luminous
intensity, the test shall be carried out under the conditions given at minimum 90% of the
higher luminous intensity.
8.4 After the lamp has been stabilised at the ambient temperature, no distortion, deformation,
cracking or colour modification shall be perceptible.
9. COLOUR OF LIGHT EMITTED
The colour of the light emitted inside the field of the light distribution grid defined at
Paragraph 3. of Annex 3, which shall be measured under conditions described in
Paragraph 7. above, shall be red. Outside this field no sharp variation of colour shall be
observed.
These requirements shall also apply within the range of variable luminous intensity produced
by rear fog lamps of Category F2.
However, for lamps equipped with non-replaceable light sources (filament lamps and other),
the colorimetric characteristics should be verified with the light sources present in the lamp, in
accordance with Paragraph 7.1. of this Regulation.

ANNEX 1
(Maximum format: A 4 (210 × 297mm)
COMMUNICATION
issued by:
Name of Administration:
.......................................
.......................................
Concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a type of rear fog lamp for power-driven vehicles and their trailers pursuant to Regulation No. 38.
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 reports issued by that service: ..............................................................................................
9. Concise description: ...............................................................................................................................
Number, category and kind of light source(s): .......................................................................................
Voltage and wattage: .............................................................................................................................

ANNEX 2
ARRANGEMENT OF APPROVAL MARKS
Model A
A = 5mm min
Figure 1
Marking for Single Lamps
The device bearing the approval mark shown above is a rear fog lamp with steady luminous intensity
approved in the Netherlands (E4) pursuant to Regulation No. 38 under approval number 2439. The
approval number indicates that the approval was granted in accordance with the requirements of
Regulation No. 38 in its original version.

A rear direction indicator lamp producing variable luminous intensity (Category 2b) approved in
accordance with the 01 series of amendments to Regulation No. 6;
A red rear position (side) lamp producing variable luminous intensity (R2) approved in accordance with
the 02 series of amendments to Regulation No. 7;
A rear fog lamp producing variable luminous intensity (F2) approved in accordance with
Regulation No. 38 in its original version;
A reversing lamp (AR) approved in accordance with Regulation No. 23 in its original version;
A stop lamp producing variable luminous intensity (S2) approved in accordance with the 02 series of
amendments to Regulation No. 7.
Model E
Marking of independent lamps
The above example corresponds to the marking of a lens intended to be used in different types of lamps.
The approval marks indicate that the device was approved in Spain (E9) under approval number 1432
and comprises:
A rear fog lamp (F) approved in accordance with the Regulation No. 38 in its original version,
A rear direction indicator lamp of Category 2a approved in accordance with the 01 series of
amendments to Regulation No. 6,
A reversing lamp (AR) approved in accordance with Regulation No. 23 in its original version,
A red rear position (side) lamp (R) approved in accordance with the 02 series of amendments to
Regulation No. 7,
A stop lamp with one level of illumination (S1) approved in accordance with the 02 series of
amendments to Regulation No. 7.
MD E3 17325
Figure 3
Light Source Modules
The light source module bearing the identification code as shown above has been approved together
with a lamp approved in Italy (E3) under approval number 17325.

5.2 For Replaceable Light Source(s):
When equipped with light source(s) at 6.75V, 13.5V or 28.0V, the luminous intensity 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, 13.5V or 28.0V). When equipped with LED light source(s) at 6.75 V, 13.5 V or 28.0 V; the
luminous flux value produced shall be corrected. The correction factor is the ratio between the
objective luminous flux and the value of the luminous flux found at the voltage applied.
The actual luminous fluxes of each light source used shall not deviate more than 5% from the
mean value.
Alternatively and in 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.

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.
2.3. Nature of Sampling
Samples of lamps shall be selected at random from the production of a uniform batch. A
uniform batch means a set of lamps 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 lamp shall be subjected to photometric measurements for the minimum values
at the points listed in Annex 3 and for the required chromaticity co-ordinates.
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 Type Approval Authority, criteria governing the acceptability
of his products in order to meet the specifications laid down for verification of conformity of
products in Paragraph 10.1. 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 5 (first sampling)
would be 0.95.

2.1.1.2 Sample B
B1: both lamps 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 lamps shall be contested and the manufacturer requested to make his
production meet the requirements (alignment) if the deviations of the measured values of
the lamps are:
2.2.1.1 Sample A
2.2.1.2 Sample B
A3:
one lamp not more than
20%
one lamp more than
20%
but not more than
30%
B2:
in the case of A2
one lamp more than
0%
but not more than
20%
one lamp not more than
20%
B3:
in the case of A2
one lamp
0%
one lamp more than
20%
but not more than
30%
2.2.2 Or if the conditions of Paragraph 1.2.2. for Sample A are not fulfilled.
2.3 Approval Withdrawn
2.3.1 Sample A
Conformity shall be contested and Paragraph 11. of this Regulation applied if, following the
sampling procedure in Figure 1 of this annex, the deviations of the measured values of the
lamps are:
A4:
one lamp not more than
20%
one lamp more than
30%
A5: both lamps more than 20%

3.2.1.1 Sample D
D2:
in the case of C2
one lamp more than
0%
but not more than
20%
one lamp not more than
20%
3.2.1.2 Or if the conditions of Paragraph 1.2.2. for Sample C are not fulfilled.
3.3 Approval Withdrawn
3.3.1 Sample C
3.3.2 Sample D
Conformity shall be contested and Paragraph 11. of this Regulation applied if, following the
sampling procedure in Figure 1 of this annex, the deviations of the measured values of the
lamps are:
C3:
one lamp not more than
20%
one lamp more than
20%
C4: both lamps more than 20%
D3:
in the case of C2
one lamp 0 or more than
0%
one lamp more than
20%
3.3.3 Or, if the conditions of Paragraph 1.2.2. for Samples C and D are not fulfilled.

Rear Fog Lamps.