Fog lights are not headlights; there are significant differences between the two for function, design, and application scenarios. Headlights (i.e., front lamps) are the primary lighting equipment of a vehicle, divided into high beams and low beams. They are used to illuminate the road ahead at night or in low-light environments, with concentrated light and a long irradiation distance. Front fog lights use yellow or white light sources, have wider light beams, and are installed at a lower position (usually below the bumper) to reduce glare caused by fog reflection. Rear fog lights are high-brightness red and are used to warn vehicles behind. Legally, fog lights are only required to be turned on when visibility is below 200 meters; using them in normal weather may interfere with other drivers. In addition, headlights are essential daily lights, while fog lights are optional or specific configurations, and some economy models may not be equipped with front fog lights. Correct use of the lighting system is crucial for driving safety, and it is recommended that drivers switch light modes reasonably according to weather conditions.
