When should you use low beam headlights?

Using low beam headlights is crucial for safe driving under various conditions. They should be utilized whenever visibility is reduced due to factors such as rain, snow, fog, or when driving at night. Low beams provide adequate illumination while minimizing glare for oncoming traffic, reducing the risk of blinding other drivers. This makes them essential not only at night but also during the day when weather conditions cannot effectively allow for high beam usage.

While other options suggest specific conditions for using low beams, they do not encompass the full range of scenarios where low beams are necessary. For instance, low beams are appropriate not only in foggy conditions but also in rain or snow. Thus, the best answer is to use low beam headlights whenever it is necessary to ensure visibility and safety for both the driver and others on the road.