Electrical photocell Switch Timer

Electrical photocell Switch timer, Photocells are a type of switch used to automatically turn on in the morning (sunrise) and turn off at night (sunset). They are most commonly used to control lighting. Photocells are better than time switches for lighting because of the variations in time of sunrise and sunset. Most new photocells are compatible with Cf Ls (check the package of the photocell for compatibility). Some Cf Ls are available with built-in photocells, but will not work in recessed (can) lights. Some photocells screw into a socket in a light fixture and a bulb screws into the photocell.