license plate lamp

Plural

license plate lamps

a small light mounted on a vehicle's rear to illuminate its license plate

A license plate lamp is a small light mounted near a vehicle's license plate to illuminate it at night, making the plate visible to others, especially law enforcement. The lamp ensures that the license plate is clearly readable in low-light conditions, helping vehicles follow road regulations. It is usually a small, weather-resistant light located directly above or below the plate.

My car's license plate lamp stopped working, so I had to replace it with a new bulb.
The police officer noticed that the license plate lamp was broken and advised me to fix it promptly.
In some countries, having a functioning license plate lamp is a legal requirement for driving at night.
During the vehicle inspection, they checked the license plate lamp to ensure it was in good working condition.
When parking in dark areas, the license plate lamp helps others see the vehicle's registration number clearly.