The role of the motorcycle angel tail light is to show the position of the motorcycle on the current road at night. It is to make it easier for the vehicles driving behind to find the brakes of the vehicles in front, so as to prevent rear-end collision accidents.

The motorcycle angel tail light is made of red (and yellow) plastic. Because the colored opaque body can only reflect the same color light as it, no matter how many colors of light from the outside world hit the tail light, it only reflects red light or yellow light. The outer surface of the motorcycle angel tail light is flat, and its interior is composed of three small plane mirrors perpendicular to each other. Multiple corner reflectors are neatly arranged right-angled pyramidal prisms. Each right-angled pyramidal prism is equivalent to a corner of a cube. When it is incident, according to the principle of light reflection, the reflected light is parallel to the incident light at 180 degrees. This special design makes it possible for the reflected light to return to the car no matter which direction the car light shines on it at night. Intensity is much greater than the general diffuse light, at this time the motorcycle angel tail light is like a glowing red light, which is enough for the driver to observe.