The BELL LED Photocell GLS BC 9W ES is a lightbulb that switches itself on via a photocell. Sensing light during the day, the photocell turns the light on once the sun has gone down, meaning you don\'t have to worry about turning the lights on yourself. Dual 360 degree sensors detect light form all angles. Perfect for home security, or outdoor safety, the BELL LED Photocell GLS BC 9W ES can give the impression of occupancy without the need for timers. Producing 810 lumens at 9w, it is equivalent to a 60w incandescent bulb. This means not only that it produces a good amount of light, but it will also save you a considerable amount on your electricity bill. Features: Automatic Dusk till Dawn switching 2700K warm white light 810 lumens equivalent to 60W incandescent bulb Instant full light, NO warm up time Long Life 25,000 hours with a 3 year warranty Perfect for porch lights