The Precision Lighting 27860 thermal type pencil photo control gives you convenient, directional control of walkway lights, parking lot lights, and security lights. At 5.2 inches in length, it is raintight with a rubber gasket conduit and zinc locking-nut, while its polycarbonate enclosure and eye makes it compatible for outdoor use. It comes with a 6-inch lead to attach to any 16 AWG wiring. Its superior construction keeps it functional in temperatures ranging between -40 degrees Fahrenheit and 158 degrees Fahrenheit and in humidity up to 96%. It has automatic on/off settings with 0-20Lx ON (dusk) and 30-60Lx OFF (dawn). The unit has a lifespan of 6,500 cycles of use and works on 208-277 volt systems. Paint your home in beautiful lighting with this automatic photoelectric lighting control.