Leviton OSFHU-CTW High-Bay Fixture Mount Occupancy Sensor, 360 and Aisle Way (Both Lenses Included) with Passive Infrared Technology, White Fast, simple installation Zero-crossing circuitry Green LED indicates occupancy detection Interchangeable lenses for 360 degrees high-bay, 360 degrees low-bay, and aisle way patterns The aisle lens is designed to provide detection of 60 ft. long by 20 ft. wide for heights up to 40 ft. mounting