About Dusk to Dawn Sensor Light bulb. Dusk to dawn sensor light bulb it dont need extra sensor socket and base the bulb will be auto light on and light off by itself the light sensor function according to built in sensor parts sensor outside surrounding light strong(light off) or week(light on). When its outside surrounding light 70lux (brightness intensity) bulb will be auto light off. Specification: 6W 600lm equivalent 60W incandescent/Edison bulb. Parameter: 5.12 Inch(H)* 2.28 Inch(W) Cover: Clear glass cover Base: E26 medium screw base. Working Voltage: AC110-130V/60Hz. Working Temperature: -4?-104? Color : Warm White 3700K200K. Lifetime: 15000h Lumes: 600lm Dimming: No-Dimmable Package: 4 x 6W dusk to dawn light bulb. Warranty: 1 Year. Note: 1. When used with fixture please make sure the fixture is well light transmission then the bulb can detect outside light well and accurate. When fixture is cover is not clear enough the light inside