You must have two headlights, all other lights are in fact not headlights and just additional light aids.
low beam headlights
Within 500 feet of an oncoming car. Within 350 feet of a car you are traveling behind.
It varies from state to state, but basically most will require at least 2 low beam head lights
Bright (high beam) headlights
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.
It doesn't.The reflectors in car's headlights' are concave.
2!
Many American cars in the 80s had horizontal taillights but no American car in the 80s had vertical headlights.
It is illegal to drive a car with faulty headlight (of any description).
It is illegal to drive a car with faulty headlight (of any description).
Within 500 feet of an oncoming car. Within 350 feet of a car you are traveling behind.
Vinegar works very well for cleaning the headlights on your car.