Under what conditions should you use low beam headlights?

Using low beam headlights in conditions such as fog, rain, or snow is essential for improving visibility and ensuring safety. Low beam headlights illuminate the road directly in front of the vehicle without causing excessive glare that can reflect off of precipitation, such as fog or rain, which can lead to decreased visibility for both the driver and other road users.

When driving in these conditions, high beam headlights can create a blinding effect, reflected back at the driver, making it harder to see. In contrast, low beams provide adequate lighting on the road while minimizing glare, allowing for safer navigation through challenging weather conditions.

Additionally, while it may be beneficial to use low beams on dark country roads or to adhere to safety practices at all times, these situations do not specifically highlight conditions that necessitate low beams in the same way that adverse weather does. The option regarding oncoming cars relates to the need to prevent glare for others, but it doesn't encapsulate the importance of low beams in poor weather conditions as effectively.