Automatically turns light on when motion is detected and off 10 mins after you leave. Senses activity at distances up to 20 ft away when mounted 8 ft from the floor, with a detection zone of 120 deg. Ideal for laundry room, garage, basement or attic because it eliminates the need to fumble in the dark for a switch or pull string. Works with incandescent, compact fluorescent and LED bulbs.