Fog tail light

The fog tail light is a red signal lamp fitted to the rear of a vehicle. Its purpose is to make the vehicle more visible to following road users when visibility is severely restricted, particularly due to thick fog.

Compared to a standard tail light, the rear fog light has a significantly higher light output. It can be a standalone unit or integrated into a rear light.

The use of rear fog lights is subject to national road traffic regulations. Permitted conditions vary between countries, particularly regarding visibility limits and weather conditions.