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 driveway Winter 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 watts Light color: warm white Connector: E26/B22 Voltage: 85V-265V Color temperature: 3500k Delay: 25~30s Sensing distance: 3~5 meters Product life: 30000H Lamp bead model: 2835 1 watt highlight lamp bead Colour:white Material:PC+Aluminum Size: 60 x 60 x 115mm Package Contents: 8x 12W Light Bulb Only the above package content, other products are not included. Note: Light reflection 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.