Direct-mounted discrete light engine for uniformity and visual comfort, Low profile, die cast aluminum housing, Versatile mount arm - Multiple drill patterns, round and square poles, Available in 50W up to 300W (7,500 - 41,000 nominal lumens), Maximize energy savings with efficacies of up to 148 lumens per watt, Replaces 70W up to 1,000W HID equivalents, Integrated stand-alone or wireless controls for energy savings, 5 optical distributions along with shielding options, 120-277V , 347V or 480V voltage options