GB/T 10485-2007 standard specifies the environment durability test requirements for external lighting and light signaling devices of road vehicles and trailers, including thermal cycling, thermal Impact, salt fog, dustproof, waterproof and other tests. The standard covers the durability test of headlamps, headfog lamps and Miscellaneous light signaling devices under different environment conditions to ensure their long-term Stability and Reliability. Through detailed test methods and conditions, the standard ensures that the performance of these devices in various environments meets safety and durability requirements.