The RAB LOSBAY800 fixture mount occupancy sensor uses passive infrared (PIR) technology with a 360-degree beam angle and triple overlapping sensors to switch lights on and off. The sensor switches lights on when it senses a person in the room and off after the room is empty for 30 seconds to 30 minutes, depending on the setting. It is suitable for LED and fluorescent loads. Optimal mounting is up to 40 feet in height. Note: This occupancy sensor is not compatible with instant start ballasts or dimmers. Includes offset bracket needed for some mounting situations.