This 2001 SPST 180-swivel mounting in Lexan Housing 208-277-Volt photo control is great for your Flood Lamp, Patio Lamp, Decorative Lighting. The sensor is conformal coated cadmium sulphide photocell resists effects of moisture and airborne contaminants so that Photocell responds to the light spectrum near to that of a human eye. Meets ANSI/UL773A.