LED A19 dusk to dawn light bulb is convenience and functionality in one. Direct replacement for 60-watt incandescent bulb, uses only 8.5 watts. The internal sensor automatically turns the lamp on at dusk and off at dawn to save you energy and effort. The bulb features a medium base and a color temperature of 2700 kelvins, 90CRI (color-rendering index) with a count of 800 lumens, this lamp provides you with 15,000 hours of warm white light. Not compatible with external photo sensors, motion sensors or timers. Lawful for sale in California.