A car brake light triangle, commonly referred to as a rear triangular brake light or third brake light, is an additional safety feature typically mounted at the rear center of a vehicle. It provides a high and central point of illumination, enhancing the visibility of the brake signal to following drivers, especially in poor lighting conditions or heavy traffic.

• Light Source: Often utilizes LEDs for bright and efficient illumination.
• Lens: A red, triangular-shaped cover that diffuses the light uniformly.
• Housing: The protective casing that encloses the light source and lens, shielding them from environmental damage.
• Mounting Bracket: A fixture that secures the brake light triangle to the vehicle, often on the rear window or trunk lid.