LED Emergency Light Bulb powers on automatically when your power goes out and illuminates key areas, allowing you to see your way to safety. Installs in any standard household medium base socket, in ceiling lights, light fixtures, and bedside lamps. Simply set to desired mode and screw bulb into socket. Operates like a normal bulb and turns on and off with any standard light switch. Perfect for basements, hallways, staircases, kitchens, bedrooms, or any room where light is needed during a power failure. While light fixture is on, the bulb charges itself and will stay illuminated > 4 hours without a power source. Included remote allows easy additional off/on, dimming modes, and will work with multiple M1-3WE27 bulbs. Unscrew bulb and use to see your way to breaker box. LED Emergency Light Bulb has a 25,000 hour lifetime, 180 lumens, and draws only 3 watts of electricity.