Bakbelystningen

Bakbelystningen refers to the rear lighting system of motor vehicles, comprising devices that illuminate the back of the vehicle to signal presence and actions to other road users. It typically includes rear position lights (taillights), brake lights, rear turn signals, a rear fog light where equipped, a license plate illumination, and rear reflectors. In many cars the high-mounted center brake light is considered part of bakbelystningen; modern systems may also include dynamic or sequential lighting patterns.

Purpose: The rear lighting serves to increase visibility in low light and adverse weather and to convey driver intent—being seen, stopping, and turning. Proper operation helps reduce rear-end collisions by signaling braking and directional changes to following drivers.

Regulation and design: Bakbelystningen is regulated by national and international standards that specify color, brightness, placement, and operation. In Europe, governing rules are set by UN ECE regulations; in the United States, by the Federal Motor Vehicle Safety Standards. Typical configurations use red rear position and brake lights, white license plate lamps, and amber rear turn signals, with rear fog lamps or reflectors in some markets. The arrangement and intensity are designed to minimize glare for following drivers.

Technology and trends: Since the late 20th century, tail and brake lights have shifted from incandescent to LEDs, improving longevity and response time. Some vehicles use adaptive or higher-intensity brake lighting to indicate urgent braking; sequential turn signals are used in some markets. The rear lighting system is evolving with automated lighting controls and integration with driver-assistance systems.