Energy efficient: Philips LED Dusk to Dawn A19 Light Bulbs use roughly 75 percent less energy than 60 Watt Incandescent Bulbs while maintaining the look and feel of a classic light bulb; 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; Each light bulb is expected to deliver a lifetime of upto 22,000 hours and includes a 10 year warranty | Soft White: Philips LED Dusk to Dawn A19 light bulbs offer warm and comfortable lighting with high CRI (color rendering index); At 2700 Kelvin these bulbs deliver bright, crisp color ideal indoor and outdoor use | 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 | Comfortable light: Our products meet strict test criteria including flicker, strobe, glare and color rendition to ensure they meet EyeComfort requirements; Switch to Philips LED, light that’s designed for the comfort of your eyes