You can put your dim lights on as soon as it gets a little bit dark, when it gets darker you can change to full beam.
You must have two headlights, all other lights are in fact not headlights and just additional light aids.
Concave mirrors are used in headlights.
Headlights are used during times in which it may be hard to see. In most states, headlights must be used when driving from dusk before sunset to sunrise.
Within 500 feet of an oncoming car. Within 350 feet of a car you are traveling behind.
Car headlights can be used to illuminate work areas, crawl spaces, and other areas where AC power is not available. In order to use headlights, they must be wired to a car battery or some other source of DC power.
Within 500 feet of an oncoming car. Within 350 feet of a car you are traveling behind.
the lights that are used to see in the dark.
low beam headlights
Concave mirrors
Halogen Bulbs
A gas that is in the air. It is used in some car headlights.
Bright (high beam) headlights