This photocontrol accepts 208-277 VAC input, has a 208-277 VA ballast capability and can power a 3,470-4,620-Watt lamp for applications such as street and highway lighting. The 1/2 in. cadmium sulphide photocell turns on lighting when the ambient light level drops below one to 3 ft. candles (fc) and works with screw-base compact fluorescent (CFL) and LED bulbs. The photocell turns lighting off when the level exceeds three-foot candles. The metal oxide varistor (MOV)-type surge arrestor reduces electric noise interference. The polypropylene photocell housing is UV stabilized and the clear acrylic window is UV-resistant. This photocontrol unit meets EEI NEMA standards for locking-type photocontrols, is Underwriter Laboratories (UL) Listed and Canadian Standards Association (CSA) certified for quality assurance and is suitable for controlling lighting.