When should headlights be switched on according to California law?

In California, the law states that headlights must be turned on no later than 30 minutes after sunset. This regulation is designed to ensure that drivers have adequate visibility during twilight and nighttime driving conditions. The reasoning behind this requirement is primarily safety-related; it helps prevent accidents that can occur when visibility decreases as daylight fades.

By mandating that headlights be turned on 30 minutes after sunset, the law encourages drivers to proactively enhance their visibility to others and improve their ability to see the road, pedestrians, and any potential hazards. This timing also accounts for changes in ambient light, ensuring that drivers are not caught off guard in lower visibility situations.

Turning on headlights only at sunset or during specific weather conditions like rain or fog could potentially leave drivers without adequate lighting in times of diminished light prior to nightfall. Thus, the focus is on providing a standard timeframe that enhances safety for all road users.