Dusk to Dawn Light Bulb, 5W (Equivalent 40 Watt Incandescent) A19 LED Sensor Bulbs, Smart Auto On/Off, Indoor/Outdoor Lighting Bulb for Stairway Porch Patio, E27 Base, 2 Pack, Not Dimmable

Dusk to Dawn Light Bulb: BOUBUI led dusk to dawn light bulb has a built-in photocell sensor that automatically measures daylight. At dusk, it will auto turn on (illumination＜15 LUX). At dawn, auto turn off (illumination＞30 LUX). This eliminates the need to physically turn the bulb on and off. Energy Saving: 5 Watt LED light bulb, 400 Lumen, warm white (3500 Kelvin), no UV radiation, no lead and mercury, can replace a 40 Watt incandescent bulb, safe and cuts your electricity costs up to 80%. Easy To Use: With standard E27 screw base, you just need to screw the dusk till dawn bulb into E27 lighting fixture. No wires, app or motion detector needed. Notice: to make the dusk till dawn outdoor light bulb work, you need to keep the power always on. Wide Application: As the bulb detects daylight only, we recomment installing on door headlight, stairway, hallway, pavement, porch, patio, garden, lawn light, pillor light. If you use it outdoors, please use it in a place or with a lighting fixture that can protect the bulbs from water. Do not use in a complete enclosed fixture, but it works well in enclosed light fixture with clear / frosted cover. Note: When parallel mounting, keep at least 1.3m / 3.9ft between two bulbs in case of mutual effect., Manufacturer: Debao