- 1 - ICS 43.040.20  
T38 
 
 
 
 
National Standard  
of the People's Republic of China  
 
 
GB XXXX -XXXX  
 
 
 
Automotive headlamps with LED light 
source(s) and/or LED module(s)  
 
 
 
  
(Draft for approval)  
 
 
 
 Issue Date: XXXX – XX – XX Implementation Date: XXXX – XX – XX 
 
 
 
Issued by the General Administration of Quality Supervision, Inspection and 
Quarantine of the People's Republic of China  
 
Standardisation Administration of the People's Republic of China (SAC)  
 
 
- 2 -  
Foreword  
Whilst the contents of the temperature cycling  test in this Standard are only recommended, 
the rest of this Standard is mandatory.  
 
GB 4599 , Motor vehicle headlamps equipped with filament lamps  and ECE R112 , Approval of 
motor vehicle headlamps emitting as asymmetrical passing beam or a driving beam or  both and 
equipped with filament lamps, as well as other relevant technical proposals, are used as the 
references of the main technical requirements of this Standard, such as: general technical 
requirements, photometric characteristics, light colour, test screen and the contents of the stability 
test of  luminosity performance , etc.  
 
− This Standard is applicable to type M and N motor vehicle LED headlamps, or LED 
headlamps equipped with LED light source(s) or LED module(s) and emitting passing beam 
or drivin g beam s. Meanwhile, an y relevant contents concerning infrared emission are not 
included in this Standard.  
− The photometric characteristics are adopt ed from  the data requirements of GB4599.  
− The colour rendering requirements are adopted from the data requirem ents of ECE R112 
draft ; however,  according to current test methods in China, the wavelength interval of the 
sampling is revised as not exceeding 5  nm. 
− The temperature cycling test is adopted  from  the methods  established in GB/T10485 -2007,  
but the maximum t emperature is adjusted to 50oC, and the test result is determined on the 
basis of : (1) whether the light source fails;  and (2) when the light source does not fail, 
whether  the photometric charact eristics qualif y. 
 
 
Appendi ces A, B, and C of this Standard a re all normative annexes.  
 
This Standard shall enter  into force on 1 January 2012.  
 
This Standard is proposed by the National Development and Reform Commission.  
 
This Standard is under the jurisdiction of the National Automotive Standardi sation Technical 
Committee.  
 
The following organisations are responsible for the drafting of this Standard:  
China Automotive Technology & Research Cent re 
Tianjin Automobile Lamp Factory  
Philips (China) Investment Co.,  Ltd 
Changchun Hella Automotive Lighting Ltd  
OSRAM China Lighting Ltd  
Tianjin Gongda HIYU Solid -state Lighting Co.,  Ltd. 
Shanghai Koito Automotive Lamp Co.,  Ltd 
Changzhou Xingyu Automotive Lighting System Co.,  Ltd 
 
The main draft ers of this Standard:  
He Yun tang, Ou yang Tao, Huang Chun wei, Huang Chong wen, Zhao B in, Xue Zhi qiang, Yu Yali, 
Liu Xi juan, Ye Lin, Niu Ping juan, Zhu Ming hua, Jin Yu qin, Meng Qin 'en. 
 - 3 -            
Automotive headlamps with LED light source(s) and/or LED module(s)  
 
(Draft for approval ) 
 
 1  Scope  
This Standard specifies the test methods and insp ection rules for the photometric characteristics, 
light colours and temperature cycling of motor vehicle headlamps equ ipped with LED light 
source(s)/ module(s) or headlamps contain ing LED light source(s)/modules.   
 
This Standard applies to  LED headlamps of  type M and N motor vehicles, or LED headlamps 
emitting passing beam s or driving beam s by LED light source(s) or LED module(s).  
 2  Normative References  
The provisions of the following documents become provisions of this Standard after being 
referenced. For dated reference documents, all later amendments (excluding corrigenda) and 
versions do not apply to this Standard ; however, the parties to the agreement are encouraged to 
study whether the latest versions of these documents are applicable. For undated refe rence 
documents, the latest versions apply to this Standard.  
 
GB 4599 -2007 Motor vehicle headlamps equipped with filament lamps  
GB 4785 Prescription for installation of external lighting and light signalling devices for motor 
vehicles and their trailers  
GB/T 7922 Method s of measuring the colour of light source s 
GB 15766.1 Lamps for road vehicles – Dimensional electrical and luminous requirements  
 3  Terms and definitions  
The terms and definitions establ ished in GB4599 -2007 and GB4785  as well as those listed b elow  
apply to this Standard.  
 3.1 Objective luminous flux  
The design values of the luminous fluxes of any replace able light source(s) or light source 
module(s).  
 3.2 Light source  failure  
When  LED light source(s) or LED module(s) are under normal service conditions  and one or more 
LED lose s luminescence functions, becomes dim or flickers .  
 3.3 LED module  
The light source module(s) which contain LED only.  
 4 Headlamp types  
Headlamps have differences in the following aspects:  
 4.1 brand names or brand;  
 4.2 the characteristics of the optical system;  
 4.3 components of reflect ion, refraction, absorption and /or deformation when in service to change - 4 - the optical effects;  
 4.4 The types of light beams supplied (passing beam or driving beam, or passing beam and driving 
beam both);  
4.5 Photometric lens es and coating materials;  
4.6 Th e types of LED light source(s)/ module(s) and photoelectricity parameters (voltage, power, 
luminous flux, chromaticity and colour rendering).  
 5  Requirements  
 5.1 General requirements  
5.1.1 LED headlamps should be designed and produc ed, under normal service condition s, such that  
even when  they experience vibration they  still meet the service requirements and comply with the 
stipulations of this Standard.  
5.1.2 LED headlamps should have good heat dissipation  so as  to prevent any heat a ccumulation 
from the LED light source(s). LED headlamps should provide normal service even in a low 
temperature  or sub-zero environment.  
5.1.3 LED headlamps should have goo d electromagnetic compatibility . 
5.1.4 Any headlamp equipped with LED light source(s ) or LED module(s)  should at all times meet 
the requirements of this Standard; the photometric characteristics and inspection of any LED 
headlamp equipped with  a filament lamp or HID light source(s) to achieve the functions o f driving 
beam or passing beam should meet the requirements stated in the relevant  standards . 
5.1.5 Headlamps should be equipped with light beam adjustment devices. When the dipped 
headlamp and the full -beam headlamp form a combination body, and each is equipped with LED 
light source(s) /module(s), filament lamp (or light unit), the adjustment device should adjust them 
individually . These requirements are not applicable to headlamp(s)  that are  equipped with dipped 
headlamp(s) and full -beam headlamp(s) which cannot be individually adjusted . 
5.1.6 LED headlamps should have labels containing the following information:  
− LED headlamp  
− Voltage  
− Reference centre  
 5.2 General requirements for LED module(s) and electronic light source control device(s)  
5.2.1 LED light source(s) which can produce visible li ght should be used for LED module(s) ; any 
other types of light source(s) must not be applied.  
5.2.2 Under normal service conditions, LED module(s) should maintain good working performance . 
There must be no design or manufacturing shortcomings,  and if any o ne LED light source fails, 
then the entire module should be treated as failing . 
5.2.3 The LED of the LED module(s) should be installed on an appropriate fixed base plate . The 
fixed base plate should be very strong and stable  in order to protect the LED and  LED module(s).  
5.2.4 The LED module(s) (inside a lamp body) should be precisely  located  and must be well fixed 
in order  to prevent movement.  
5.2.5 With regard to replaceable LED module(s), when replacing the LED module(s), the LED 
module(s) which comply w ith the design requirements should be applied; different sp ecification 
LED modules in the same lamp body are not permitted to replace one another.  - 5 - 5.2.6 Regardless of  whether  the electronic light source control device is located inside or outside of 
the la mp body, it should be treated as part of the LED headlamp.  
5.2.7 If a special statement is not provided by the manufacturer , then the LED module(s) should be 
tested in the headlamp(s) provided by the manufacturer . 
5.3 Photometric characteristics  
5.3.1 The passing beam of any headlamp should provide sufficient illumination and should not  
cause dazzling, and the driving beam should provide good illumination. The illumination for 
bending roads should be achieved by an additional light source , which  forms part of the dipped 
headlamp. If the additional light source fails , the photometric characteristic should still satisfy the 
passing beam requirements.  
5.3.2 Photometric characteristics should be measured on a vertical plane photometric screen which 
is 25  m in fr ont of the reference centre of the headlamp . The positions of each test point  and test 
zone are shown in Diagram 1.  
 
 
- 6 - 5.3.3 Photometric requirements for  the passing beam  
5.3.3.1 On the photometric screen, the passing beam should generate a clear cut -off line; its 
horizontal part should be positioned at the left side of the v -v line,  and the right side of the cut -off 
line should be HV -H2-H3 line or HV -H1-H2-H4 line.  Multiple visible cut -off lines are not 
permitted.  
The illuminance limit value on the photom etric screen should conform to the specification  set out  in 
Table  1. 
Table 1  
Point, line, zone  Horizontal distance  
(mm)  Vertical distance  
(mm)  Illuminance  
(lx) 
HV 0 0  0.7  
B50L  L 1500  U 250   0.4  
75R R 500  U 250   12 
75L L 1500  D 250   12 
50L L 1500  D 375   15 
25L L 1500  D 750   2 
50V 0 D 375   6 
50R R 750  D 375   12 
25R R 3960  D 750   2 
Any point in Zone I     2.E 50Ra 
Any point in Zone III     0.7  
Any point in Zone IV     3 
E50Ra is the actual measured illuminance value of 50R.  
 
5.3.3.2 With  regard to any LED he adlamp, on a photometric screen  the limit illuminance values 
from test point 1 to test point 8 should conform to the following specification:  
Test point 1+2+3  0.3 lx;  
Test point 4+5+6  0.6 lx;  
- 7 - 0.7 lx  test point 7  0.1 lx;  
0.7 lx  test point 8  0.2 lx.  
5.3.3.3 With regard to any LED headlamp equipped with  an adjustable reflector, each service 
location of the reflector specified by the manufacturer  should conform to the specifications set out 
in 5.3.3.1 and 5.3.3.2.  
5.3.3.4 Within  zones I, II, III and IV, there should not be any transverse illumination that a ffects 
good visibility.  
5.3.3.5 If an illumination light beam for bending roads is achieved using  the following methods, 
then the requirements  set out  in above Table 1 should a lso be applicable to headlamps provid ing 
illuminati on light beams to bending roads:  
5.3.3.5.1 the passing light beam  is rotated  or the turning point of the cut -off line  is moved 
horizontally ; 
5.3.3.5.2 one or more optical components of the headlamp  is move d, but the turning point of the 
cut-off line remains static at the horizontal direction.  
5.3.3.5.3 one more  light source  is added , but the turning point of the cut -off line remains static at 
the horizontal direction.  
5.3.4 Photometric requirements for the driving beam  
5.3.4.1 The illuminance limit value of the driving beam on the photometric screen should conform 
to the speci fications set out  in Table 2.  
5.3.4.2  With regard to any LED headlamp equipped w ith an adjustable reflector, each service 
location of the reflector specified by the manufacturer  should conform to the specifications set out 
in 5.3.4.1.  
5.3.4.3 With regard to any LED headlamp emittin g both passing beam and driving beam , the 
maximum illu minance value of its driving beam should not exceed 16  times the measured 
illuminance va lue of 75R of the passing beam.  
5.3.5 The effective area of the illuminance measur ement on the photometric screen  should be within 
a square of side  length  65 mm.  
   Table 2      Unit: lx  
Test point or test zone  Illuminance  
Emax  48 and  240 
HV point   0.80E max 
HV point to 1125L and R   24 
HV point to 2250L and R   6 
5.4 Light colour  
The light colour of a ll LED headlamp s should be white, presented with CIE chromaticity 
coordinate s, the chromaticity characteristics  thereof being in accordance with  the specifications 
established in GB4785.  
5.5 Light source  
LED headlamps should use LED light source(s) or LED module(s) which comply with this 
Standard; if a headlamp contains any other light source(s), then they must  comply with the - 8 - specifications estab lished in GB 15766.1 or ECE R37 . 
The objective luminous flux of any headlamp equipped with LED light source(s) or LED module(s) 
should not be lower than 1000lm.  
 
5.6 Colour rendering  
The colour rendering of any LED headlamp or LED module(s)  should meet the minimum 
requirements on spectrum red light composition:  
   
  
In which:  
Ee() (unit: w): Spectrum luminescence power  
V() (unit: I): Spectrum luminescence efficiency  
() (unit: nm): Wavelength  
The calculation of this value sho uld use an interval not greater than 5  nm. 
 
5.7 Stability of the photometric characteristics of  LED headlamps  
After the photometric characteristics of a n LED headlamp have been  measured in accordance with 
the rules of this Standard, the integral lamp shoul d conform to the requirements set out in 
Appendix  A. 
5.8 Stability of the illuminance, chromaticity and temperature of LED headlamp s 
5.8.1 After a n LED headlamp been lit for one minute and its illuminance is stable, all of the 
illuminance values of its tes t points and test zone s should meet the requirements for the  maximum 
value and minimum value. Throughout  the entire test process the luminosity output must not be 
lower than 70% of the initial luminous flux.  
5.8.2 After a n LED headlamp or a n LED module bee n lit for one minute and its illuminance is 
stable, the colour  of its light  should be within the specified range.  
5.8.3 See Appendix B for the test methods.  
5.9 Plastic photometric lenses and plastic optical components of LED headlamp s 
5.9.1 The plastic ph otometric lens of a headlamp after being test ed in accordance with 6.7.1  should 
comply with the requirements set out in Appendix B to GB4599 -2007.  
5.9.2 LED headlamp anti -UV radiation  
5.9.2.1 If any optical unit (including transmission components and refl ection components) made of 
plastic materials is installed inside a n LED headlamp, a test should be c arried out in accordance 
with 6.7.2 . After the test, the chromaticity of the headlamp should conform to  the requirements  set 
out in Article 5.4 ; no deficien cies such as cracks, deformation, (coating)  peeling etc.  should appear  
on the surface of the sample.  - 9 - 5.9.2.2 The test does  not need to be  carried out  on LED headlamp s equipped with low UV radiation 
type LED module(s)  or any relevant optical unit of a LED h eadlamp that uses  protection for anti -
UV radiation , such as filter lens es. 
Low UV radiation type LED headlamps or LED module(s) should meet:  
   
  
In which: S() (unit: l):  Spectrum (effect) weighting function  
Km = 683 lm/W: maximum luminous efficacy limit of luminary  
See section  5.6 for the meaning of other symbols.  
The calculation of this value should use  an interval not greater than 5  nm. 
The tab le of UV radiation spectrum weight is based on the wavelength of 270  nm as the 
representative value (as S()=1); for UV radiation spectrum we ight values of other 
wavelength , use the values  set out  in Table 4 as the substitution:  
 
Table 4  Spectrum weight va lue of UV radiation  
 S()  S()  S() 
250 0.430  305 0.06000  355 0.000  16 
255 0.520  310 0.01500  360 0.000  13 
260 0.650  315 0.00300  365 0.000  11 
265 0.810  320 0.00100  370 0.000  09 
275 0.960  325 0.000  50 375 0.000  077 
280 0.880  330 0.000  41 380 0.000 064 
285 0.770  335 0.000  34 385 0.000  530 
290 0.640  340 0.000  28 390 0.000  044 
295 0.540  345 0.000  24 395 0.000  036 
300 0.300  350 0.000  20 400 0.000  030 
 
5.10 Temperature -resistance cycling test of LED headlamp s 
This test should be  carried out  in acc ordance with Appendix C . During the lighting in the final  
period  of a  cycl e, check whether there is  any permanent or intermittent fail ings with respect to  the 
LED module(s). If there are any failings , then the headlamp  does not qualif y; if there are no 
failings , then the photometric characteristics should be checked and should conform to the relevant 
requirements set out in 5.3.  
5.11 Reversed polarity and over -voltage of  the LED headlamp  power source  
After the test, there should be no full or part failings  by the LED light source(s) and the electronic 
light source control device of the sample.  - 10 -  
6 Test methods  
6.1 Test room, devices and facilities  
6.1.1 There should be no light leakage into the dark room hen testing. T he environmental condition 
of the dark r oom should not affect the transmission performance of the light beam and the accuracy 
of the instruments.  
6.1.2 The photometric screen should be sufficiently wide so as  to be convenient for check ing and 
adjust ing the cut -off line of the passing beam; the c olour of the photometric screen should be 
convenient for light beam aiming,  and stray light effects should be removed during the photometric 
test. 
6.1.3 A regulated DC power supply should be used for the photometric test . The accuracy of the 
electrical ins trument should not be lower than Grade 0.2, and a Grade 1 illuminometer as specified 
by the national verification regulation should be used as the illuminometer (its indication error 
should not exceed ± 4%).  
6.2 The ambient temperature of  the photoelectric  characteristics test should be 23oC ± 5oC, 
with relative humidity within the range of 20% ~ 80%.  
6.3 Photometric test  
6.3.1 Before the test, a 15 -hour burn -in should be conducted on the LED module(s) of the 
headlamp,  which should then be cooled to room te mperature.  
6.3.2 If there are no other instruction s, the voltage of the photometric test should be: 13.2V± 0.1V 
(nominal voltage 24V should be 28.0V ± 0.1V). If any electronic light source control device is used, 
then a test  should be carried out in accord ance with the parameters specified by the manufacturer . 
6.3.3 When the sample lamp is continuously li t and until the luminosity of the lamp is stable, then 
the sample should undergo a test in accordance with Appendix B.  
6.3.4 Passing beam aim ing 
6.3.4.1 Ve rtical direction  
The horizontal part of the cut -off line should be located  at a distance of  25 cm under the h -h line;  
6.3.4.2 Horizontal direction  
The turning point of the cut -off line should be located on the v -v line . If the turning point is not 
clear,  then the illuminance values which meet 75R and 50R should be used as the reference.  
6.3.4.3 In order for the cut -off line to be easily visible when aiming, then part of the photometric 
lens is permitted to be covered.  
6.3.4.4 To check whether the aiming i s correct, perform a visual inspection to check that the cut -off 
lines are within  a range of 5o (219  cm) from both sides of the v -v line as the reference.  
6.3.4.5 After  aiming has been  conducted as  stipulated  above, if the passing beam does not meet the 
requirements, then the cut -off line is permitted to be adjusted by 1o (44 cm) left and right and within 
a range  not exceeding h -h line respectively.  
6.3.4.6 When the illumination beam for bending roads is achieved by means of rotating the passing 
beam or hor izontally moving the turn ing point of the cut -off line,  the measureme nt should then be 
taken after re-aiming of the headlamp is complete (such as using a goniometer).  
6.3.4.7 When the illumination beam for bendi ng roads is achieved by means of moving one o r more 
optical components of the headlamp, and the turning point of the cut -off line remains at the - 11 - horizontal direction, then the measurement should be taken  when these optical components are 
located at the extreme operating position.  
6.3.4.8 When the ill umination beam for bending roads is achieved by means of an additional light 
source and the turning point of the  cut-off line remains at the horizontal direction, the measurement 
should be taken  when the light source is connected.  
6.3.5 Driving beam aiming  
The centre of the maximum illuminance zone of the light beam should be located at the HV point.  
With regard to any individually adjustable driving beam s, driving beam aiming should be conducted  
or the passing beam should be used as the aiming reference, w hich means after the aiming of the 
passing beam is conducted, other further adjustment s must not be permitted when measuring the 
driving beam.  
6.3.6 With regard to any LED headlamp s equipped with  an adjustable reflector  
6.3.6.1 According to the centre of the light source(s) and the connecting line between the HV points 
of the photometric screen, for each service position on the adjustable reflector find out the 
correspond omg positions on the test goniometer. Then , in accordance with  the provisions specifie d 
in 6.3.4 and 6.3.5 , move the reflector position for aiming.  
6.3.6.2 After initially locating the reflector in accordance with 6.3.4, the passing beam should 
conform  to the provisions set out in 5.3.3 and the driving beam should conform to the  provisions set 
out in 5.3.4.  
6.3.6.3 Carry out  the additional test  in accordance with  the following rules  
Vertically move the reflector for ± 2o (or, if the adjustment range of the reflector from its initial 
position is less than 2o, then the reflector should be move d to its maximum adjustment position), 
after which use a  test goniometer from the opposite direction to carry out re -aiming.  The 
illuminance values  of III zone (HV point) and 75R of the passing beam  and the illuminance values 
of E max and E HV point of the d riving beam should  now  conform to the specifications set out in this 
Standard.  
6.3.6.4 If the manufacturer  specified the number of the service positions for the reflector, then tests  
should be carried out at each service position in accordance with the pro visions set out in 6.3.6.1 to 
6.3.6. 3. 
6.3.6.5 If the manufacturer  did not specify any service positions for the reflector, then tests  should 
be carried out at the average adjustment position of the reflector  in accordance with the provision s 
set out in 6. 3.6.1 and 6.3.6.2 . The reflector  should then be moved  to the maximum adjustment 
position, after which  an additional test  should be carried out in accordance with the  provisions set 
out in 6.3.6.3 . 
6.3.7 Use the product of the actual measured photometric ch aracteristic values of the LED 
headlamp and 0.7 as the illuminance values of each test point/zone.  
6.3.8 If any one functional light distribution (driving beam or passing beam) of a LED headlamp is 
achieved by LED module(s) and filament bulb both, then the  sum of each measurement should be 
taken.  
6.4 Light colour inspection  
In accordance with  the colour measurement methods for illumination light source(s) established in 
GB/T 7922, afte r aiming (1 minute or once stable),  take the direct measure ment  at the 50 V point of 
the passing beam  and of the HV point of the driving beam. The voltage of the measurement should 
conform  to the test voltage of photometric characteristics.  - 12 - 6.5 The stability of the photometric characteristics of LED headlamp  
See Appendix A for the test method.  
6.6 Stability of  illuminance, chromaticity and temperature of LED headlamp s 
See Appendix B for the test method.  
6.7 Plastic photometric lens es and plastic optical components of LED headlamp s 
6.7.1 See Appendix B to GB4599 -2007 for the test s for photometric lens es, material sample s and 
integral lamp s of LED headlamp s equipped with plastic photometric lens es. Where  light source(s) 
need to be lit during test ing, a headlamp inte rior illuminant should be used  to light the lamp  
according to the t est voltage . 
6.7.2 Plastic anti -UV radiation unit of LED headlamp  
Use light emitted from LED module(s) to conduct 15 hours of continuous illumination to each type 
of relevant plastic headlamp sample, or a headlamp sample which contains plastic optical 
comp onents. If any optical unit is used in the test, then the corresponding positions such as the 
angle,  distance etc. of each type of relevant plastic sample and LED module should be the same as 
the angle, distance etc. of the sample in the  headlamp.  
6.8 Temp erature -resistance c ycling test for LED lamp s 
See Appendix C for  the test method.  
6.9 Colour rendering measurement s 
Use a spectrum analyser to measure the minimum red light composition.  
Take  the measurements at the 50V point of the passing beam or/and the HV point of the driving 
beam . The measured result should comply with the provisions of 5.6.  
6.10 Reversed polarity and over -voltage of the power source of LED headlamp s  
6.10.1 Reversed polarity test  
With regard to 12V voltage system, apply one minute of 1 4 ± 0.1V reverse voltage to the input 
terminal of the product power control device; with regard to 24V voltage system,  apply one minute 
of 28 ± 0.2V reverse voltage to the input terminal of the product power control device.  
6.10.2 Power over -voltage test  
For a 12V voltage system, apply 60 minutes of 18 ± 0.2V reverse voltage to the input terminal of 
the product power control device; for a 24V voltage system,  apply 60 minutes of 36 ± 0.2V reverse 
voltage to the input terminal of the product power control d evice.  
7 Inspection rules  
7.1 Different type s of headlamps should be determined in accordance with the provisions specified 
in Chapter 4.  
7.2 The inspection of a headlamp is divided into type inspection and production conformity 
inspection. If the inspecti on result s conform to  the provisions specified in 7.3 or 7.4, this product 
should be considered as having passed  both  its type inspection and production conformity 
inspection.  
7.3 Type inspection  
The manufacturer  should provide:  
− sufficient d rawings to iden tify th e type of headlamp in triplicate, the characteristic structure - 13 - of the photometric lens or reflector should be indicated in the drawing, the reference axis, 
reference centre and the installation geometric position on the vehicle, the service position  
of the reflector and the adjustment range also should be marked in the drawing. With regard 
to any headlamp specified in 5.3.3.5 which provide s illumination  of bending roads , the 
adjustment range should be provided ; 
− a brief technical instruction , includin g information such as the specification, dimension, 
photometric parameter and objective luminous flux of the LED module(s), as well as the 
power connecting port of the electronic light source control device , etc. If the headlamp  
contains any filament bulbs , then the type of filament bulb used should be specified ; 
− two sample lamps.  
With regard to the plastic material test of  plastic photometric len ses and plastic optical components:  
− 14 photometric lenses.  
(a) Six of the 14 lenses can be replaced by six mater ial samples with minimum size of 60  mm x 
80 mm; the curvature radius of their external surfaces should not be smaller than 300  mm, and in 
the centre there should be a  sufficiently flat  area of minimum of 15  mm x 15  mm for the 
measurement;  
(b) Each  photomet ric lens or material s ample  should be produced by way of batch production.  
(c) Each piece of every type of relevant plastic sample in the optical units of the LED headlamp or 
headlamp conta ining plastic optical component should have the same appearance, co lour and 
surface treatment characteristics as the lamp undergoing inspection.  
(d). Test should be carried out on  13 of the photometric lenses  in accordance with the  stipulations of  
Table C.1 of Appendix C to GB4599 -2007 ; one more  photometric lens should un dergo anti -UV 
radiation test ( where required ). 
− An integral lamp not equipped with a  photometric lens (include reflector).  
7.3.1 Characteristic statement concerning  the photometric lens and coating materials ; if a test has 
been carried out,  a relevant test report should be attached  thereto . 
7.3.2 Each sample lamp should conform to the provisions specified in 5.1, 5.2 and 5.5.  
7.3.3 Carry out the  test in accordance with Chapter 6 . Each sample lamp should conform to the 
provisions specified in 5.3, 5.4, 5.6, 5 .7, 5.8, 5.10 and 5.11.  
7.3.4 With regard to any headlamp which uses a plastic photometric lens and plastic optical 
components, the headlamp should conform to the provisions specified in 5.9.  
7.4 Production conformity inspection  
7.4 With regard to any prod uct which qualifies from the type inspection, select  sample lamps  at 
random to determine  production conformity.  
7.4.1 Sample lamps  which are  selected  at random  should conform to the provisions specified in 5.1, 
5.2 and 5.5 of this Standard.  
7.4.2  Carry out  tests in accordance with Chapter 6 . The photometri c characteristics of  samples 
which are selected at random should conform to the following provisions:  
7.4.2.1 Select any one requirement from the two passing beam requirements  
7.4.2.1.1 In accordance with  the provisions specified in 5.3.3.1 , ease the illuminance limit of the 
passing beam by 20%, but among which ease B50L for 0.2lx, ease the III zone for 0.3lx;  
7.4.2.1.2 Extend the effective test area of B50L, 75R, 50V, 25R and 25L of the passing beam to - 14 - circles with the test points as the circle cent res and  radius of 15  cm. Reduce the height of IV zone 
from 37.5  cm to 22.5  cm, the width remain s unchanged . Apart from easing B50L for 0.1lx and 
easing the III zone (HV point) for 0.2lx, other illuminance limits should still conform  to the original 
specifications.  
7.4.2.2 In accordance with  5.3.4.1 , ease the illuminance limit of the driving beam by 20%, in which 
case ease the illuminance limit of HV point to 0.75E max. 
7.4.3 The sample lamp should conform to the pr ovisions specified in A.2.3 of Appendix A.  
7.4.4 Any headlamp which uses plastic photometric lenses should  also  conform to the provisions 
specified in B.3 of Appendix B to GB4599 -2007 required in 5.9.1.  
 - 15 - Appendix A  
(Normative A nnex)  
Stability tests for the  photometric characteristics of LED headlamps  
 
A.1 Stability test of the photometric characteristics  
The test should be carried out in dry, still air with a temperature of 23oC± 5oC. The integral lamp 
should be installed on a stand that can correctly repre sent the  position of the vehicle installation . 
A.1.1 Clean headlamp  
The headlamp should be lit for 12 hours in accordance with the rules stated below in A.1.1.1, and 
the inspection should be carried out in accordance with the provisions specified in A.1.1. 2. 
A.1.1.1 Test method  
The headlamp should be lit in accordance with the following rules:  
A.1.1.1.1 (i) for full-beam headlamps or dipped beam headlamps, the corresponding filament/LED 
module(s) should be lit for 12 hours21; 
(ii) when the passing beam and driving beam are mixed (dual filament bulb or two  filament 
bulbs/LED module(s)): if the  manufacturer  specifies  that each time the headlamp is used, one 
filament/ LED module  should be lit , then successively lig ht the passing beam filament(s) /LED 
module(s) an d driving beam filament(s)/LED module(s) for six hours individually.  
Under all other circumstances2 3, light the passing beam filament(s) /LED module(s) for 15 minutes, 
light all the filament(s) /LED module(s) for five minutes , and use this method to light  for total of 12 
hours;  
(iii) for combined illumination function s:  
In accordance with  (i), light all of the single functions at the same time for the specified time; the 
mixed illumination function (ii) light method can also be considered  in accordance wi th the 
manufacturer’s instructions . 
A.1.1.2 Test voltage  
With regard to the LED module(s), in accordance with the provisions specified in 6.3 of this 
Standard:  
Any LED combined headlamp equipped with  a filament bulb , adjust ment of the voltage of the 
filame nt bulbs  should be  made  according to 90% of the maximum power sp ecified in GB15766.1 or 
ECE R37 . 
Unless other instruction s are  specified by the manufacturer , otherwise under all circumstances, the 
filament bulb power of 12 V nominal voltage should be used. In the former situation, the filament 
bulb with the greatest power should be used for the test.  
A.1.1.2 Test result s 
A.1.1.2.1 Visual inspection  
                                                
2 When the headlamp being tested is combined  and/or  mixed w ith a signal lamp, the signal lamp should be lighted 
during the test. With regard to any turn signal lamp, should be lighted with flickering method, the time comparison 
between switch on and switch off is nearly 1:1.  
3 When headlamps are flickering , the fi laments of tw o or more than two lamps are lit  at the same time, but th ese are  
not normal  condition of use for filaments.  - 16 - Once a headlamp has cooled down to the ambient te mperature, the photometric lens should be 
cleaned with a clean  wet cotton cloth, and a visual inspection  should be performed  to check that 
there is no evident deformation, distortion, cracks or change in colour of  the photometric lens.  
A.1.1.2.2 Photometric test  
In order to conform  to the requirements of this Standar d, the photometric values of 50R, B50L, HV 
of the passing beam and the Emax photometric value of the driving beam should be checked. This 
includes  the tolerance o f the photometric methods; the permitted deviation of the illuminance values 
between before th e test and after the test is 10%.  
Because the stand my have heat deformation, aiming adjustment is permitted ( changing of  the 
vertical position of the cut -off line should be  done  in accordance with A.2).  
A.1.2 Polluted headlamp  
After the headlamp  has been  tested in accordance with the points mentioned above  in A.1.1, the 
headlamp should be prepared in accordance with A.1.2.1 below ; then , in accordance with  A.1.1.1 , 
the headlamp should be lit for one  hour, after which an inspection should be carried out  in 
accordance with A.1.1.2.  
A.1.2.1 Headlamp preparation  
A.1.2.1.1 Test mixture  
A.1.2.1.1.1 For any headlamp equipped with a glass photometric lens  
The composition (weight ratio) of the test mixture used for coating the ph otometric lens of the 
headlamp is  show n below:  
Nine  parts particles  between 0 -100m silica sand;  
One part particles  between 0 -100m botanical carbon powder;  
0.2 part of NaCMC3 and a suitable quantity of distilled water ( with electrical conductivity lower  
than 1mS/m).  
The validity of the test mixture should not exceed 14 d ays. 
A.1.2.1.1.2 For headlamp s equipped with plastic photometric lens es 
The composition (weight ratio) of the test mixture used for  coating the photometric lens of the 
headlamp is shown below:  
Nine  parts particles  between 0 -100m silica sand;  
One part particles between 0 -100m botanical carbon powder;  
0.2 par t NaCMC4; 
13 parts distilled water (with  electrical conductivity lower  than 1mS/m);  
(2± 1) parts of surfactant.  
The dosage tolerance of surfactant can enable the test mixture to be evenly spread on the entire 
photometric lens. The validity of the test mixture should not exceed 14 days.  
A.1.2.1.2 Test mixture coating  
                                                
 
4  NaCMC represents Sodium Carboxymethyl Cellulose, normally represented as CMC. NaCMC is used in test 
mixture; when  the temperature i s 20oC, the substitution (DS) of its 2% solution is 0.6 – 0.7, the viscosity is 200 – 
300cp.  - 17 - The test mixture should be evenly  spread  onto the entire light trans mission surface of the headlamp. 
When the coating is dry, re -spread  until the illuminance value of the E max of the  driving beam, and 
the illuminance values of the 50R and 50V of the passing beam are reduced to 15% -20% of the 
initial values.  
A.1.2.1.3 Measurement facility  
Measurement facilities similar to those used for  type in spection should be used. For semi -sealed 
beam headlamp s, standard filament bulbs should be used for measuring the  photometric 
characteristics.  
A.2 T est for changing  the vertical position of the cut -off line  under heat  
Under hea t, this test is used to inspe ct whether the offset of the vertical position of the cut -off line 
of the passing beam exceed s the specified value.  
After undergoing the test in accordance with the provisions specified in A.1, under the situations of 
not taking off from the test stand or not readjusted , a test should be carried out on the headlamp  in 
accordance with A.2.1.  
A.2.1 Test  
The test should be carried out in dry, still air with a temperature of 23oC± 5oC. 
Batch produced LED module(s)/ filament bulbs which ha ve undergone at least on e hour burn -in 
should be used . Adjust the test voltage and light the headlamp in accordance with A.1.1.1.2.  
With regard to the cut -off line lies between the vv line and through B50L point vertical line, 
measure the vertical positions when the headlamp been working  for three  minutes (r 3) and 60 
minutes(r 60). 
In order to ensure  accuracy and reproducibility, any methods can be used to measure the changes of 
the vertical positions of the cut -off line.  
A.2.2 Test result  
When rI = |r 3-r60|  1mrad, acceptance sh ould be granted.  
If 1mrad < r I  1.5mrad, then the second headlamp should undergo a test in accordance with A.2.1. 
At this time, the passing beam  of the headlamp should undergo  three timing -cycles of one hour 
switched on and one hour switched off. The lig ht voltage should be adjusted in accordance with 
A.1.1.1.2.  
After the test, if (r I + r II ) /2 1mrad, then acceptance should be granted.  
A.2.3 Production conformity  
After undergoing the three  continuous timing -cycles in accordance with A.2.2,  carry out the test in 
accordance with A.2.1  above , if r I  1.5mrad, then acceptance should be granted.  
If 1.5mrad < r I  2.0mrad, then the second headlamp should undergo the test in accordance with 
the provisions. When (r I + r II ) /2 1.5mrad, then acceptance s hould be granted.  
 - 18 - Appendix B  
(Normative annex)  
Stability tests for  illuminance, chromaticity and temperature of LED headlamps  
B.1 Illuminance  
B.1.1 The following test points should be measured for the luminosity of a headlamp when a certain 
function is li t for one minute. During the measurement, aiming may be carried out approximately, 
but this aiming position  should be maintained until the proportional measurements  have been taken . 
Test points: Passing beam 50V; driving beam HV  
B.1.2 The test lamp should be continuously lit until luminosity is stable: within 15 minutes, the 
luminosity change value of the test points required in B.1.1 should be smaller than 3%.  
When luminosity is stable, record the luminosities of the test points required in B.1.1 . In accor dance 
with the requirements specified in 6.3.4 or 6.3.5 carry out aiming, and take the  luminosity 
measurement at all test points.  
B.1.3 C alculate the ratio  on the basis of the luminosi ty values of B.1.1 and B.1.2 . 
B.1.4 . This calculation ratio should be applied to all test points . Calculate the luminosities of all test 
points when li t for one minute.  
B.1.5 Both of the measured luminosity values when  lit for one minute and after the luminosity is 
stable should meet the maximum and minimum value  requirements . 
B.2 Light colour  
Take the  light colour measurement when  lit for one minute and when the luminosity is stable as 
described in B.1.2 ; both of the measured light colour s should be within the required range.  
B.3 The measur ement of the objective luminous flux of the LED module(s) of  the passing beam 
should be measured in accordance with the following method:  
B.3.1 The shapes of the LED module(s) should conform to  the description  set out  in the technical 
specification of 7.3.  Any secondary optical element should be removed. This procedure and the test 
conditions described below should be recorded in the test report.  
B.3.2 Three units of each type of LED module(s) and their detailed instruction statement(s), 
together with any l ight source control device used should be submitted.  
B.3.3 When testing, the heat emission state of the modules should simulat e the heat emission state 
when the modules are in the corresponding headlamps.  
Before the test, the modules should undergo 72 hou rs of burn -in as with headlamps under same 
normal service conditions.  
When any integrating sphere is used, the minimum dimension of the integrating sphere is one 
metre, and should be at least 10 times the largest sized LED module. A goniophotometer quadrat ure 
measurement (at room temperature) can also be used to measure the luminous flux.  
The LED module should be lit inside  a sealed integrating sphere or inside a goniophotometer for 
approximately  one hour.  
The measurement of luminous flux should be taken  when the LED module /s described in B.1.2 
is/are stable.  
The average measured values of three LED modules of each type is regarded as the objective 
luminous flux of this LED module, and the objective luminous flux of each type of LED module - 19 - should take the a verage measured value of three LED modules.  
 
Appendix C  
(Normative annex)  
Temperature -resistance cycling test of LED headlamps  
C.1 Test condition s 
C.1.1 Check the photometric characteristics before and after the test.  
C.1.2 Before inserting  the sample, the  airflow in the chamber should be 1m/s ~ 2m/s.  
C.1.3 The distance between the sample and the chamber wall should be more than 200  mm. 
C.2 Test method  
C.2.1 Both samples should be installed on a test stand ; when placed in side the test chamber, the 
reference  axis should be parallel to the principal direction of the cooling airflow.  
C.2.2 The samples should undergo five high-low temperature cycling tests illustrated in Diagram 5, 
the duration of each cycle  being  eight  hours. That is:  
Test cycling: five; 
Durati on of each cycle: eight hours;  
Temperature curve: in accordance with Diagram 1;  
Temperature conversion rate: 0.6oC/min ~ 5.0oC/min;  
Cycling start temperature: 20oC; 
Low temperature: -30oC / at least two hours;  
High temperature: 50oC / at least two  hours;  
Lighting method: shown in Diagram C.1, light from point “A” until to point “B”, then switch off;  
Test voltage: 13.2V ± 0.1V (with regard to 24V nominal voltage LED headlamp, the test voltage 
should be 28.0± 0.1V).  
Diagram C.1 Temperature - time curve of te mperature cycling test  
 
C.2.3 After the test is complete , remove the samples from  the chamber and keep the samples in 
room temperature,  23oC ± 5oC, and relative humidity of 30% ~ 60% for one hour.