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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 m...