Abstract: A motorcycle helmet, snowmobile helmet, or other apparel worn by riding a vehicle is coupled with a brake light assembly. The brake light assembly includes a receiver circuit for receiving an encoded radio frequency (RF) signal from a transmitter located on the vehicle. The receiver circuit turns on the brake light for a predetermined amount of time after the brake signal is received. The transmitter is turned off for a second predetermined amount of time after the encoded signal is transmitted. The second predetermined amount of time is less than the first predetermined amount of time. The second predetermined amount of time is advantageously a pseudo random of time. The radio-controlled brake light system advantageously increases noise immunity and spurious illumination of the brake light in response to signals from other riders or operators.

Abstract: A motorcycle helmet with a brake light includes a duty cycled receiver circuit for receiving a radio frequency (RF) signal from a transmitter located on the motorcycle. The receiver circuit is generally turned off if the RF signal is not present. When the receiver detects the RF signal, the receiver is turned on. The brake light is illuminated when the receiver receives the RF signal. The brake light includes LEDs for providing light. The lens is a plastic lens which provides superior performance having spherical indentations on an interior surface.