Come home to a well-lit house, with the adds safety and security benefits provided by Bulbrite's Dusk to Dawn LED light bulb. This light bulb automatically turns on at dusk and off at dawn, and uses a proprietary design that reduces false ons/offs. The light sensor is not visible, giving it a seamless look that does not detract from the bulbs appearance. This LED Dusk to Dawn bulb fits any fixture suited for a standard A19 with standard E26 base. This is a pack of four.