The service life of automotive fog lights depends on the bulb type, frequency of use, and environmental conditions. Common halogen fog lights have a lifespan of approximately 500 to 1000 hours, xenon fog lights can reach 3000 hours, while LED fog lights perform the best with a lifespan usually exceeding 5000 to 10000 hours. It is best to turn them on only when visibility is below 200 meters and turn them off promptly when the weather improves to avoid unnecessary wear and tear. For daily maintenance, it is necessary to regularly clean the dirt on the surface of the lamp cover, check the stability of circuit connections, and avoid touching the glass surface of halogen bulbs with bare hands to prevent local overheating and explosion due to grease residue. If the light dims, flickers, or the lamp cover becomes blurry, the bulb should be replaced in a timely manner, and original factory or first-line brand accessories should be preferred to ensure compatibility and durability. For example, LED lamp sets need a supporting heat dissipation solution to slow down light decay, while converting halogen to xenon lights requires the installation of a ballast, but the service life after modification may only be slightly longer than that of the original halogen lights. Reasonable use and regular maintenance can significantly extend the service life of fog lights and ensure driving safety in rainy or foggy weather.