The light bulb stays on 25~30S,then the detector automatically shuts the light off unless it continues to sense movement.Built-in a photocell sensor, deactivates the motion sensing light bulb during the daylight hours to save energy.Super bright, gives off 1000 lumen, 85% energy saving, 12W LED replace 100W halogen bulb.For best effectiveness, position a motion sensor light to cover the walks leading to your front and back doors and the drivewayWinter sensor range diameter is 13ft-20ft, but in summer the sensing area diameter is 6ft-10ft, it is only half of winter. Its best to mount this motion sensor light bulb 6-10ft. above the ground and position the motion sensor towards to the sensitivity zone.It can not work with enclosed fixture, the motion sensor must exposed outside.Power: 12 wattsLight color: warm whiteConnector: E26/B22Voltage: 85V-265VColor temperature: 3500kDelay: 25~30sSensing distance: 3~5 metersProduct life: 30000HLamp bead model: 2835 1 watt highlight lamp beadColour:whiteMaterial:PC+AluminumSize: 60 x 60 x 115mmPackage Contents:2x 12W Light BulbOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.