The Intermatic NightFox EK4236SD89 is a professional-grade electronic photocontrol designed for reliable outdoor lighting automation. Engineered to permanently install on standard outdoor electrical boxes or lighting fixtures, it features a 1/2-inch 14 NPSM threaded stem with a swivel mount for precise directional positioning. It is highly optimized for LED, HID, and incandescent installations up to 1000 Watts (Tungsten) or 1800 VA (Ballast) across a universal voltage range of 120-277 VAC. Built for a 15-year design life, this heavy-duty gray polycarbonate control utilizes a non-drift silicon light sensor with an IR filter, a robust DC relay with zero-crossing circuitry to eliminate high inrush current damage, and a conformal coated PCB for superior weather protection down to -40 degrees Fahrenheit