When are high beam lights not required to be used?

High beam lights should not be used in fog, snow, or heavy rain because these conditions can create a hazardous driving environment. The light from high beams can reflect off the precipitation or fog, causing a blinding effect for the driver and reducing overall visibility. Instead, low beam lights are recommended in these conditions as they provide better illumination of the road immediately ahead without creating glare.

Furthermore, using high beams when visibility is obscured can lead to dangerous situations not only for the driver but also for other road users, as it can distract or blind them. That's why it is essential to adjust headlight use according to weather conditions to ensure safe driving.