What color must a motorcycle's tail lamp be during inspection?

During a Texas vehicle safety inspection, a motorcycle's tail lamp must be red. This requirement aligns with the established standards for vehicle lighting to ensure visibility and safety on the road. The red color of the tail lamp serves to signal other drivers about the position and movement of the motorcycle, especially in low-light conditions or at night.

Using red for tail lamps helps differentiate between various types of vehicle lights, such as brake lights and turn signals, which may also utilize red but have specific functionalities. This clarity is essential for safety, as it allows other motorists to easily interpret the actions of a motorcycle on the road.

The other color options do not conform to the regulation for tail lamps on motorcycles. Green, blue, and yellow lights have different uses and purposes that do not provide the necessary signaling needed for tail lamps, which are meant to be red for uniformity and safety on the road.