Dusk to Dawn Light Bulb, E14 Candelabra Sensing LED Bulbs Auto On/Off 5W 400LM Warm White 3000K for Home Outdoor Yard Porch Patio Garage Pathway, Can Replace 40W Incandescent Bulbs, Pack of 2

Thanks to the dusk-to-dawn sensor technology, it offers an energy-saving solution. This bulb turns on automatically when the ambient brightess is insufficient (at dusk or in the night, brightness＜30 lux), and turns off when the ambient brightness is sufficient (at dawn or in the day, brightness＞30 lux). You don’t need to physically turn the light on and off, and it helps to illuminate the night while avoiding unnecessary waste. 5W LED light bulb can replace 10W-40W halogen/incandescent, saving 80% on your electricity bills than traditional halogen/incandescent light bulbs. Simple installation, screw it like a general E14 LED bulb, leave the switch on and keeping it on. No need a separate light sensor, additional motion detection or sound control fixtures. Perfect for courtyard, hallway, garage, pathway and any other places where need to keep lighting all night.