In what situation should fog lights be used?

Fog lights are specifically designed to improve visibility in low-visibility conditions, such as fog, heavy rain, or snow. They emit a wide beam of light that is directed lower to the ground, reducing the amount of light that reflects off water droplets or snowflakes in the air. This helps to illuminate the road directly in front of the vehicle without causing glare that could hinder your visibility or that of other drivers.

Using fog lights in bright daylight or on highways with no other vehicles may not provide any significant benefit and could potentially distract other drivers. Furthermore, fog lights are not intended for off-road driving; they are most effective when used in challenging weather conditions where general headlights may struggle to provide adequate visibility. Thus, the use of fog lights is best reserved for those specific adverse weather conditions.