Automotive fog lights are lighting devices specifically designed for low-visibility environments. Their primary function is to penetrate rain, fog, snow, or dust through high-intensity scattered light sources, thereby improving road visibility. Front fog lights typically employ yellow light sources, as their longer wavelengths scatter less in adverse weather conditions, effectively illuminating road conditions within a range of 50 to 100 meters. Rear fog lights feature a conspicuous red colour, serving to alert trailing vehicles during reduced visibility conditions and lowering the risk of rear-end collisions. In compliance with safety standards, fog lights must be activated when visibility decreases below 200 meters. Should visibility drop under 100 meters, drivers are required to reduce speed accordingly; if visibility falls below 30 meters, it is advisable to park at the roadside and engage hazard warning lights. Their use under normal conditions may impair other drivers' visibility, and concurrent operation with hazard warning lights should be avoided to prevent interference with turn signal indication. Regular inspection of fog light functionality to verify proper optical performance and electrical circuitry constitutes an essential component of fundamental vehicle maintenance.
