Easy Twist Lock Installation: The photocell outdoor lighting sensor adopts a rotary twist lock design that makes installation and replacement fast and tool-free. Standardized plugs fit most common twist lock sockets, increasing compatibility. Auto On/Off Convenience: photocell light sensor features an internal illumination detection circuit that automatically switches lights off at dawn and on at dusk, eliminating manual operation. , - housing protects against water and debris for long-lasting outdoor performance in varied climates. Built-In Delay Function: This dusk to dawn sensor is suitable for standard twist lock sockets on barn lights, post lamps and other outdoor fixtures. A built-in 5-second delay helps prevent false triggering caused by car headlights, or brief light flashes, ensuring your lights respond only to genuine changes in ambient brightness. Stable Wide-Voltage Operation: Designed with a broad working voltage of 120V to 277V, these photocell switches deliver reliable, consistent performance with strong anti-interference and anti-thunder circuitry. Ideal for outdoor lighting in parks, streets, parking lots, sidewalks and yards where dependable, automatic control is essential. Heat-, LED-Ready Design: Unlike traditional thermo-photocells, this twist photocell maintains repeatable set points without generating excess heat, preserving a stable internal temperature and color over its service life., Weight: 0.21054146021 pounds, Manufacturer: Hipzeepo