What is the minimum requirement for rear lights on a vehicle?

The minimum requirement for rear lights on a vehicle is two red lights. This requirement ensures that a vehicle is visible from behind, enhancing safety on the roads, especially in low-light conditions or during night-time driving. The red color is standard for rear lights because it indicates to other drivers that the vehicle is slowing down or stopping. This visibility helps prevent rear-end collisions by providing a clear signal to vehicles approaching from the back.

In cases where only one rear light is present, the ability to signal and indicate the presence of the vehicle is significantly diminished, which can lead to dangerous situations on the road. Having two functional red lights ensures that if one light fails, the other can still serve its critical function for visibility and safety.