Mr Beams MB985 ReadyBright Ceiling Light for use with Wireless Power Outage LED Lighting System (1 ceiling light only) Automatically detects a power failure and provides up to 40 hours of bright light. This light is not activated by motion, it only works in conjunction with the Mr. Beams MB220 remote control. Simple wireless installation - no electrician needed. Light can be controlled by the remote for maximum safety, convenience and battery life. Lights up entire rooms during a power outage. Auto shut off to conserve battery life and to turn the light off automatically if no one is home.