Translation guide
The main forward-facing light on a vehicle, used for driving at night or in low visibility.
The main light on the front of a car, motorcycle, or other vehicle.
The most common and general term for a vehicle's headlight. Used for cars, motorcycles, etc.
夜はヘッドライトをつけてください。
Please turn on your headlights at night.
ヘッドライトが切れている。
The headlight is out.
Formal or technical term for headlight, often used in vehicle regulations or manuals.
Casual term for 'light', often used in context to mean headlight. Can be ambiguous, so context is important.
前照灯の検査基準を満たす必要がある。
The headlights must meet inspection standards.
The lights are dim, so let's replace them.