Led motion sensor light bulb stays on as long as it detects movement. Motion sensor bulb automatically go out 20 s after the movement has stopped. Dusk to dawn motion detector light bulbs have a photocell sensor which blocks motion detection during daylight and activates the motion activated light bulb at night. Installation motion detector light bulb - just screw the motion light bulb into the socket and turn on the switch. The light bulb with motion sensor have a motion sensor on a top of the bulb. The motion sensor must point downward or towards moving people. Detection angle 120 PIR indoor motion sensor light bulb does not sense movement in closed fixtures. Glass Shade will reduce sensitivity. Specifications of pir motion sensor led bulb - 12w; 120V; Warm 3000K; Brightness: 960 LM; Bulb Base: E27 Operating Temperature 100w motion sensor light bulb from 14 F (-10 C) to 95 F (35 C). Package includes: 1 x Volanson 12W warm white bulbs with motion sensor. Free Replacement within One Year. Our customer care service is ready to help 24 hours a day.