GE LED+ Dusk to Dawn 60-Watt Replacement A19 LED general purpose light bulb turns on the light automatically at dusk and turns off automatically at dawn with the built-in dusk-to-dawn light sensor. No wiring or timers required. When the room gets dark, the light turns on. When the sensor detects ambient light, the light automatically turns off. The Soft White LED light bulb is rated to last 13 years at 3 hours use per day and saves 85 over the life of the bulb versus a 60-Watt incandescent bulb. Use this dusk-to-dawn LED A19 general purpose bulb in non-dimmable table lamps and open fixtures that are frequently left on at night.