What is a fog light on car for?

Fog lights are typically mounted low on the vehicle's front bumper, often below the headlights. They are designed to provide additional illumination in conditions of reduced visibility, such as fog, heavy rain, or snowfall. Fog lights emit a wide, low beam that is intended to spread out and remain below the fog line, reducing glare and improving visibility. They are particularly effective at illuminating the road surface and objects close to the vehicle, helping drivers to see potential hazards and obstacles. Fog lights are usually designed with yellow lenses, as yellow light has been found to be more effective at penetrating fog than white light.