Light activates when motion is detected, light timer shuts off light after selected time of 1, 5 or 10 mins after motion stops. Automatic photocell deactivates unit in daylight to save energy. Pulse count technology reduces false sensing from wind and rain. Manual override turns light off or on with existing indoor wall switch. Allows light to stay on continuously all night when needed. Up to 30 ft range from hidden 150 deg motion sensor, aiming adjustment angle of 90 deg. Uses one 100 W medium base bulb. UL listed incandescent fixture suitable for wet locations, wall mount only. 16-1/2 in H x 5-7/8 in W x 6-7/8 in D.