You should turn on your headlights:

Question

Headlights must be used one half hour after sunset until one half hour before sunrise, when windshield wipers are being used due to rain or snow, and in any other situation when visibility is less than 1,000 feet. They should be used when a car is being driven on a small country or mountain road, even in sunny weather.

Accepted Answer

One half hour after sunset.

Answer

When stopped at a railroad crossing.

Answer

When parked at a school.