Automatic on or set up occupancy/vacancy sensor to require manual-on operation. Ambient light detection feature prevents the lights from turning on automatically if there is enough ambient light already in the space. Precise light level control with a dimmer for any activity. Detects fine motions of room occupants. Lights automatically turn on to the level at which they were last used when the occupancy sensor activated the lights.Saves energy, sensor automatically turns lights off when room is unoccupied. Delayed fade-to-off allows time to exit a room before lights turn off. Maximum capacity 150 watts CFL/LED. UL listed.