What is the function of a license plate lamp in a vehicle?

The function of a license plate lamp in a vehicle is to provide light to the rear of the vehicle's license plate. This is important for several reasons: it ensures that the license plate is visible at night or in low-light conditions, which assists law enforcement and other drivers in identifying the vehicle. Additionally, many regulations require that license plates are illuminated so they can be easily read, contributing to road safety and compliance with the law. This ensures that the vehicle is in accordance with state regulations regarding vehicle visibility and identification.