The automotive lighting system is mainly composed of four major parts: external lighting lamps, internal lighting lamps, external signal lamps and internal signal lamps. External lighting lamps include headlights, fog lamps, etc., which are primarily used for nighttime road illumination and visibility enhancement in adverse weather conditions. Headlights typically employ LED or halogen light sources with brightness exceeding 1000 lumens. Internal lighting lamps encompass dome lights, instrument panel lights, step lights, etc., with power ratings ranging from 2 to 20 watts, utilizing white light to provide uniform cabin illumination. External signal lamps such as turn indicators and brake lights utilize high-intensity red or amber LEDs, with luminous intensity conforming to UNECE regulatory standards. Internal signal lamps include warning functions like seat belt reminder lights. Modern lighting systems commonly incorporate intelligent control technologies, such as automatic headlights activated via photosensors, while some premium models feature Adaptive Driving Beam (ADB) systems capable of dynamically adjusting illumination ranges to prevent glare. The lighting system's wiring harness typically employs heat-resistant materials, with fuse ratings designed according to lamp power consumption, commonly ranging from 5A to 15A. During replacement, particular attention must be paid to the lamp's IP protection rating, especially for fog lamps which require a minimum waterproof rating of IP6K7.
