Brake lights are essential safety features on vehicles that illuminate when the driver applies the brakes. They are typically located at the rear of the vehicle and serve to alert other drivers that the vehicle is slowing down or stopping. This warning helps prevent rear-end collisions, especially in low visibility conditions or heavy traffic. Most modern vehicles use LED or incandescent bulbs for their brake lights, which can vary in brightness and color. In many regions, it is required by law for vehicles to have functioning brake lights. Regular maintenance is important to ensure that these lights are operational and visible to other road users.