Torchstar Dusk To Dawn Light Bulbs Outdoor, Sensor A19 Led Light, Pack Of 4 ?Sensitive Dusk to Dawn Sensor: This A19 LED bulb works properly even in lighting fixtures or close to other fixtures by only detecting sunlight rather than other light sources ?Conserve Energy: This sensor light bulb automatically turns on at night and turns off at daytime, saving you the trouble of manual controls and saves energy when not needed ?Light up Every Corner: This 9W A19 light bulb can light up every dark corner thanks to its incredible 800lm output that puts an end to worrying about tripping and falling in the dark and protects your home's safety when you aren't at home ?Wide Application: The dusk to dawn light bulbs outdoor are a great match for porches, garages, gardens and outdoor lamps thanks to the common E26 base that lets photocell light bulb be used with all E26/E27 socket lighting fixtures ?Reliable Backup: This photocell light bulb is UL and Energy Star listed for outstanding quality. The hassle-free 3-year unlimited warranty provides you with our excellent after-sales service ?NOTE: Don't cover the red photo sensor with anything. Only used for outdoors