The ENERLITES MPC-50V is a commercial grade line voltage ceiling mount sensor that operates lights using passive infrared (PIR) technology. The sensor features a 360° field of view fresnel lens that provides up to 1200 sq ft of coverage area. This ceiling mounted sensor operates lights ON/OFF based on occupancy and ambient light levels detected in the area. The occupancy sensor turns lights ON when motion is detected and OFF when no motion is detected for a pre-selected time delay. Ambient light level detection prevents the occupancy sensor from turning lights ON when the ambient light levels are sufficient. Both the time delay and light level settings can be easily adjusted. This ceiling sensor is compatible with either LED or fluorescent lights. The sensor is also compatible with ENERLITES 91245 momentary switch for optional vacancy mode and manual ON/OFF operation. This ceiling mount motion sensor is ideal for use in offices, classrooms, warehouses and other commercial areas.