With  the advancement of automotive technology, the light source of the lamp  has gradually developed, and LED has some new applications in the field  of signal lamps and in the field of headlights. The  known LED signal lights are front-mounted, single LED light sources, as  well as light pipes, LED light sources and light pipes, and light  guides. At  the "3rd China Lantern System Development Forum" hosted by China  Automotive Consulting Center, Wang Dan from the National Automobile  Quality Inspection Center (Xiangyang) explained in detail the national  standards and related information for vehicle lamp detection.
According  to Wang Dan, the standards used in China and the Australian standards  are all developed in accordance with European standards, and the  Australian standards are still lower than the Chinese national standards  in some respects. The  standard for automotive LED headlamps is 25991. Its content is  basically the same as that of ECE-R112, and the detection method is the  same. In  terms of light distribution performance, the light distribution  performance of the LED headlamp should meet the requirements of  illumination and glare. When testing, the LED module of the headlamp  should give it 13.2V voltage, and the aging should be performed before  the test. In  terms of color rendering, the standard requires that the content of the  red component of the LED should be greater than or equal to 0.05 in the  entire visible range.
For  LED lamp detection, due to the LED light source and luminosity,  chromaticity, and temperature sensitivity, a certain stabilization time  is required before photometric measurement. In  terms of test voltage, LED front fog lamps, headlights and signal lamps  all have a clearly defined test voltage, followed by corrections for  the light distribution measurement. The current standard is that the  headlamp and front fog lamps require a correction of 0.7. (Zhou Lingyun)