When are you required to use headlights?

The use of headlights is legally mandated during specific conditions to enhance safety while driving. The requirement to use headlights from sunset to sunrise is designed to ensure that vehicles are visible in the darker hours of the day when natural light is insufficient. Additionally, headlights must be used when visibility is low, such as during rain, fog, or other adverse weather conditions, which can obscure sight lines and reduce the distance at which a vehicle can be seen.

This approach serves multiple safety purposes: it not only helps the driver see the road and surrounding environment more clearly but also allows other drivers, pedestrians, and cyclists to see the vehicle in low-light or poor weather conditions. Proper use of headlights significantly decreases the likelihood of accidents that can occur due to reduced visibility.

The other options do not encompass the full range of situations in which headlights are required, as they either limit the conditions unnecessarily or do not align with legal requirements regarding driving safety.