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GB 4660-2016: Motor vehicle front fog lamps equipped with filament lamps
GB 4660-2016
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.20
T 38
Replacing GB 4660-2007
Photometric characteristics of power-driven vehicle front
fog lamps
ISSUED ON: DECEMBER 30, 2016
IMPLEMENTED ON: JANUARY 01, 2017
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions... 4 
4 Different types of front fog lamps ... 5 
5 Requirements ... 5 
6 Test methods ... 12 
7 Inspection rules ... 15 
8 Transition period requirements ... 19 
Appendix A (Normative) Stability test of photometric performance of front fog lamps
(full lamp test of front fog lamps) ... 20 
Appendix B (Normative) Requirements for front fog lamps with plastic photometric
lens - Photometric lens or material samples and whole lamp tests ... 26 
Appendix C (Normative) Relevant provisions for installing LED modules or light
source generators ... 32 
Appendix D (Normative) Cut-off sharpness of grade-F3 front fog lamp and its
definition as well as procedures for sighting using the cut-off line ... 37 
Appendix E (Normative) Tolerance requirements for batch consistency control
procedures ... 40 
Photometric characteristics of power-driven vehicle front
fog lamps
1 Scope
This standard specifies the photometric performance, test methods, inspection rules, for
the front fog lamps for motor vehicles.
This standard applies to various types of front fog lamps, which are used in categories
L3, L4, L5, M, N motor vehicles.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB 4599 Motor vehicle headlamps equipped with filament lamps
GB 4785 Prescription for installation of the external lighting and light-signaling
devices for motor vehicles and their trailers
GB 15766.1 Lamps for road vehicles - Dimensional, electrical and luminous
requirements
IEC 60061 Lamp caps and holders together with gauges for the control of
interchangeability and safety
ECE R37 Uniform provisions concerning the approval of filament lamps for use in
approved lamp units of power-driven vehicles and of their trailers
ECE R99 Uniform provisions concerning the approval of gas-discharge light
sources for use in approved gas discharge lamp units of power-driven vehicles
3 Terms and definitions
Terms and definitions, which are defined in GB 4599, GB 4785 and GB 15766.1, apply
to this document.
have inseparable mirrors. For this type of assembly, it shall meet the requirements
of 5.9.2.3 or 5.9.3.3.
5.2 Chromaticity requirements
The light color of the front fog lamps shall be white or yellow; its chromaticity
characteristics shall comply with the provisions of GB 4785.
5.3 Requirements for the stability test of photometric performance of front fog
lamps
The front fog lamps shall meet the requirements of Appendix A.
5.4 "Requirements for front fog lamps of plastic light-distribution mirror -
Requirements for light-distribution mirror or material specimen and whole lamp
test"
5.4.1 If the light-distribution mirror of the front fog lamp is made of plastic material, it
shall also meet the requirements of Appendix B.
5.4.2 The light-transmitting parts of the plastic material, in the front fog lamps, shall be
subjected to the UV radiation resistance test, according to B.2.7.
5.4.3 For light sources with low UV radiation, which meet the following requirements,
the tests specified in 5.4.2 may be exempted:
a) Low UV radiation light source of ECE R99 and GB 15766.1;
b) The light sources of Appendix C;
c) The light source, whose UV radiation is shielded by measures, such as filters.
5.5 Light source requirements for front fog lamps
5.5.1 Requirements for front fog lamps with replaceable light sources
5.5.1.1 The type of lamp holder of light source shall conform to the data sheet of the
lamp, which is corresponding to the light source category, in GB 15766.1 and IEC
60061.
5.5.1.2 The light source shall be easily installed to the front fog lamps.
5.5.1.3 The light source can only be installed in the correct position.
5.5.2 Requirements for front fog lamps using LED modules and light source
generators
5.5.2.1 LED modules and light source generators shall only be installed in correct
positions.
5.5.2.2 Different light source modules are not interchangeable, in the same lamp unit.
5.5.2.3 The LED module or light source generator shall be anti-vibration.
5.5.3 Light source requirements for grade-B front fog lamps
5.5.3.1 It shall be equipped with a filament bulb, which meets the requirements of GB
15766.1 or ECE R37:
a) The reference luminous flux of the filament bulb does not exceed 2000 lm;
b) It is allowed for the use of any filament lamps, which are not restricted in GB
15766.1 or ECE R37, as well as its subsequent series of amendments.
5.5.3.2 If the filament bulb is not replaceable, it shall also comply with the provisions
of 5.5.3.1.
5.5.4 Replaceable/non-replaceable light source requirements for grade-F3 front
fog lamps
5.5.4.1 One or more light sources, which complies with GB 15766.1, ECE R37 or ECE
R99.
5.5.4.2 AND/OR one or more LED modules, which shall meet the requirements of
Appendix C. Its compliance shall be determined by testing.
5.5.4.3 AND/OR light source generator, which shall meet the requirements of Appendix
C. Its compliance shall be determined by testing.
5.6 Sharpness and linearity requirements for cut-off lines
When there is an objection to the sighting, for the grade-F3 front fog lamps, it shall be
tested for the sharpness and linearity of the cut-off line, in accordance with the
provisions of Appendix D.
5.7 Electromagnetic compatibility requirements
Front fog lamps and their ballasts OR electric light source controllers shall comply with
electromagnetic compatibility requirements. The consistency of electromagnetic
compatibility requirements is related to the specific vehicle type.
5.8 Other requirements
5.8.1 The front fog lamp can use an additional system, to control the light intensity; OR
when mixed with another function, the additional system can also be used to control the
light intensity.
6.4.1.1.1 There shall be at least one complete set of front fog lamps; the standard bulbs
can be provided by the manufacturer or the applicant. For the case where the filament
bulb directly uses the vehicle voltage: The front fog lamp test shall use the colorless
standard filament bulb in GB 15766.1 or R37 Regulation. The test voltage shall use the
voltage specified to the reference luminous flux, which is obtained at 13.2 V, on the
data page of GB 15766.1 or Regulation No. R37.
6.4.1.1.2 For lamps that use electric light source controllers, as part of the front fog
lamp system, the voltage of the input terminals of the lamps shall be as specified by the
manufacturer or the applicant.
6.4.1.1.3 For lamps that use an electric light source controller, which is not part of the
front fog lamp system, the voltage published by the manufacturer or the applicant shall
apply to the input terminal of the electric light source controller. The manufacturer or
applicant shall provide the electric light source controller for the luminaire.
6.4.1.2 For front fog lamps using gas discharge light sources
A standard gas discharge light source, which meets the requirements of GB 15766.1 or
ECE R99 Regulations AND has undergone 15 cycles of aging in accordance with G.4
of GB 15766.1 or Article 4 of Annex 4 of ECE R99 Regulation, shall be used.
When the front fog lamp is tested, for the 12 V system, the terminal voltage of the
ballast terminal or the integrated rectifier and the light source shall be kept at 13.2 V,
OR at the vehicle voltage (±0.1 V) as stated by the manufacturer or the applicant.
The luminous flux of the gas discharge light source may be different from that described
in GB 15766.1 or ECE R99 Regulation; in this case, the luminous intensity value shall
be appropriately corrected.
6.4.1.3 For front fog lamps with non-replaceable light sources
For all front fog lamps, which are equipped with non-replaceable light sources, the
voltage shall be 6.3 V, 13.2 V or 28.0 V, OR according to the vehicle voltage, which is
described by the manufacturer or the applicant. The manufacturer or applicant shall
provide a specific power source. The test voltage shall be applied to the input terminals
of the luminaire.
6.4.1.4 For front fog lamps using LED modules
If not otherwise specified, the test voltage of the front fog lamps, which are equipped
with LED modules, shall be the corresponding 6.3 V, 13.2 V or 28.0 V. The LED module,
which is controlled by the electric light source controller, shall be measured according
to the input voltage, which is specified by the manufacturer or the applicant; OR by the
operating device and power supply that replaces the electric light source controller. The
corresponding input parameters (such as duty cycle, frequency, pulse shape, peak
voltage) shall be stated in the submission.
Among them, judge whether the LED module meets the requirements of 5.5.2.1, by
testing whether the line 3 and line 4 in Table 2 meet the requirements.
6.4.2 Sighting method of grade-F3 front fog lamp
6.4.2.1 The sighting screen for visual calibration, as shown in Figure 3, shall be placed
10 m or 25 m in front of the front fog lamps.
6.4.2.2 According to the provisions of D.2, the light and dark cut-off line of the front
fog lamps shall be adjusted to a position 1° below the H line.
6.4.2.3 When there is a problem with visual sighting or the position of the cut-off line
is ambiguous, the following tests shall be completed:
a) Adjust according to D.3; confirm the quality of the cut-off line according to D.4;
b) Use the instrument method, which is specified in D.5, for sighting.
6.4.2.4 In the case where the specified photometric performance cannot be satisfied, the
cut-off line of light and dark is allowed to re-sight, within the range of not more than
±0.5° in the vertical direction and/or not more than ±2° in the horizontal direction.
6.5 Chromaticity inspection of front fog lamp
The inspection of chromaticity of the light, which is emitted by the front fog lamps,
shall be white or optional yellow, as selected by the manufacturer or the applicant.
Selective yellow light can be obtained, by the natural color of the light source, OR by
changing the color of the front fog light lens, OR by other methods. The chromaticity
of the front fog lamps shall be measured, at the voltage specified in 6.3.2 or 6.4.1.
7 Inspection rules
7.1 Type inspection
7.1.1 Materials provided by the front fog lamp manufacturer or applicant
7.1.1.1 There are 3 sets of detailed drawings; the type of front fog lamps are clearly
identifiable and there shall be a front view of the front fog lamps; the details of the
optical components shall be drawn in detail, if any, including the cross section; the
position for certification mark shall be left on the drawings.
If the headlamp is equipped with an adjustable reflector, it shall indicate the installation
position of the front fog lamp, as relative to the ground, AND the installation position
of the longitudinal symmetry plane of the vehicle, as long as the front fog lamp can
only be used in this position.
7.1.1.2 For the plastic material test for plastic optic lenses, it shall provide:
fog lamp system, the description of the electric light source controller (if any)
and/or the voltage and tolerance shall be indicated in the technical description.
7.1.3.4 If the front fog lamp is equipped with LED modules or a distributed lighting
system (DLS), the technical description shall also include the part number assigned by
the light source manufacturer or applicant, a dimensional drawing and basic electronic
and optical data, a description of whether the light source meets the UV radiation
requirements of C.4.6, a test report corresponding to 5.5.2 and the target luminous flux.
7.1.3.5 If a distributed lighting system (DLS) is used, that is, the beam of the front fog
lamps is provided by this component. The technical description shall also include a
description of the light guide, the corresponding optical components, the information
sufficient to identify the light source generator. The information description shall
include the part number, which is assigned by the light source generator manufacturer
or applicant, a dimensional drawing, the basic electronic and optical data, a test report
corresponding to 5.5.2.
7.1.3.6 If the front fog lamp uses a gas discharge light source, it shall provide:
a) A rectifier that allows the whole or part of it to be integrated with the front fog
lamps. And the rectifier is not integrated with the light source.
b) If the non-replaceable light source, which is used by the distributed lighting
system (DLS), is not approved by R99, two sets of systems shall be submitted
simultaneously for each type, which shall include light source generators and
rectifiers, if applicable.
7.1.3.7 For the light sources required by a), b), c) of 5.4.3, if it cannot provide proof,
such as UV protective glass filter to shield the UV radiation of the discharge light source,
for the plastic parts, THEN, it shall provide the following:
One sample shall be submitted for each relevant material. The sample shall have a
similar geometry to the front fog lamp or distributed lighting system (DLS) being tested.
And each material sample shall have the same appearance and finish, as the front fog
lamps, which are submitted for certification, if any.
7.1.3.8 For front fog lamps, which are certified according to 7.1.3.7 and/or 5.5.2, the
plastic internal optical parts shal...