Under what visibility condition should fog lights be used?

Fog lights are specifically designed to be used in conditions of low visibility, typically when visibility falls below 100 meters. This is because fog, heavy rain, or snow can significantly reduce how far ahead a driver can see, making standard headlights less effective. Fog lights produce a wide, low beam of light that helps illuminate the road immediately in front of the vehicle without causing glare for drivers in oncoming traffic or those ahead.

Visibility exceeding 100 meters would generally mean that standard headlights are sufficient for driving, and using fog lights in such conditions could create unnecessary glare. In clear weather, utilizing fog lights is inappropriate as it can also distract other drivers, and nighttime conditions alone do not justify the use of fog lights if visibility remains adequate. Hence, the recommendation is to use fog lights specifically when visibility is compromised to enhance safety on the road.