License plate lights are externally mounted illumination devices fitted to the vehicle’s rear, required for legal road operation. These assemblies utilize incandescent, LED, or halogen bulb technologies to provide consistent white illumination of the rear license plate. Housings are typically constructed of durable plastic and integrate a moisture seal to withstand environmental conditions. Modern designs often incorporate a direct-connect wiring harness or a standardized bulb socket for ease of replacement. Electrical systems operate on 12V DC, drawing minimal amperage, and are often integrated with the vehicle’s tail light circuit.