【Dusk to Dawn Light Control】With the dusk to dawn sensor, the light socket converts the exterior lantern to an automatic night light. It helps turn on the wall light or porch light automatically at dusk, and off at dawn, achieving energy efficiency while providing home safety. No more switching lamps on/off manually..【Smart Spring Loaded Contact Design】Upgraded design of spring-loaded central electrode, the adjustable photocell sensor socket can be 360°rotated, allows you to turn the sensor to face the direction that light comes from. It ensures the photo eye aims outwards while contacting the power source..【Work with E26 E27 Base Bulbs】The automatic light sensor socket works with LED, CFL, incandescent, and halogen E26/E27 base bulbs up to 150W, great for adding a dusk-to-dawn feature on existing outdoor lighting fixtures. UL listed for safe use..【Easy Installation & Smaller Size】No complicated wiring or program is required, simply install it in an existing light socket and then screw the bulb into the fixture. Adding 1.61’’ in height, the small light socket will not affect the appearance of your porch light..【Adding Security and Convenience】The screw-in photocell socket can be widely used in wall lights, post lamps, and garage lights around the house for night convenience. It automatically turns on your light to simulate home occupancy and deter intruders. Tips: Do not use it with an opaque or frosted glass fixture.