Final answer:
When driving in snow, use low beam headlights and reduce speed for optimal visibility and safety. High beams can cause glare, and driving at regular speeds can be dangerous due to reduced traction.
Step-by-step explanation:
When driving in snow, you should use low beam headlights and reduce speed. This is because low beam headlights spread the light across the road without causing glare which can be reflected back in snowy conditions, reducing visibility. Reducing speed is also crucial because snow can decrease the traction between the tires and the road, leading to increased stopping distances and greater difficulty in handling the vehicle. High beams can reflect off the snow and impair vision, and driving at the posted speed can be unsafe due to lowered traction. The power requirements for headlights can be of interest when discussing electricity in car components, where the initial high power use is due to the low resistance of the cold bulb which increases as it warms up, thus reducing power consumed.