About this item ✅【Dusk to Dawn Auto On/Off】These light sensing bulbs are made with advanced photocell sensors inside so they can automatically power on at dusk and off at dawn according to the ambient brightness. Simply keep the power switch on and leave them alone. 1900K LED devices are in these bulbs. They will give off yellow sunset glow light when they are on, although they look white when off. This yellow light can effectively reduce the tracking of flying insects while bulbs illuminating. ✅【Easy to Install】 New generation, doesn't have a light sensing eye. The angle it senses sunlight is wide as same as it emits light. Don't need to worry the sensing direction during screw in. ✅【Intelligent Energy-Saving】With a built-in advanced smart driver chip, the bulb will reduce energy consumption by 50% after working for 6 hours as most people are asleep and require less light. Qualilux is the first to set this function to reduce waste. ✅【Support Close Range Use】Supported by QUALILUX unique technology, these A19 light sensing bulbs can recognize their own light and other light, which is a perfect solution for arranging two or more bulbs closely as they won't interfere with each other. Notice: This function is only applicable to QUALILUX Dusk to Dawn Bulb. Other brands of lights will make it go out. ✅【LONG LIFE SPAN WARRANTY】 These bulbs are long lifespan up to 25,000 hours. The premium quality is guaranteed with a 3-year warranty, 100% satisfied service with replacement for quality issue. 30 Days Money Back and 36 Months Replacement for any issues.