Under what conditions should a driver switch to low-beam headlights?

Switching to low-beam headlights in conditions of moisture or precipitation is important because high-beam headlights can reflect off of rain, snow, or fog, creating glare that reduces visibility for both the driver and other road users. Low beams provide a more focused light that helps to illuminate the road directly in front of the vehicle while minimizing the scattering of light that can occur in these conditions. This adjustment not only enhances safety by improving visibility but also helps prevent accidents caused by impaired sight lines. In contrast, high beams can create a blinding effect when light reflects off moisture in the air, which is counterproductive to safe driving.