This photocontrol with swivel will turn lights on at dusk and off at dawn automatically. Ideal for parking lots, building perimeters, sports fields, outdoor sign illumination and other outdoor uses. Features swivel and stem mount; use the swivel to position photocell accurately. Light-sensitivity is adjustable to prevent lights from turning on unnecessarily. Lowers energy costs because lights only come on when needed. The Woods brand of timers and home controls bring simplicity to your life, by maximizing convenience, security and energy savings.