ENERGY EFFICIENT: Philips LED Dusk-to-Dawn A19 Light Bulbs use roughly 75 percent less energy than 60 Watt incandescent bulbs; Philips LED light bulbs are Mercury free and Energy Star Certified LONG LASTING: These Philips LED bulbs last 10x longer than incandescent and 4x longer than halogen bulbs; These bulbs are expected to deliver a lifetime of up to 22,000 hours, saving you the cost of frequent bulb replacements EYE COMFORT TECHNOLOGY: Our LEDs conform to our EyeComfort standard, which measures our products against a set of key comfort criteria- flicker, glare, stroboscopic effect, photobiological safety, dimmable, tuning, and color rendering DUSK-TO-DAWN: Philips LED Dusk-to-Dawn A19 Light Bulbs are equipped with a built-in light sensor that turns your light bulbs on automatically when the sun goes down and turns the light off when the sun rises COMPATIBILITY: These Philips LED light bulbs fit in E26 medium screw bases; Not compatible with Philips Hue products; Philips LED Dusk-to-Dawn A19 light bulbs are for non-connected use only