The fixture was designed for optimum performance utilizing either T5 or T8 lamps. The Green Hi-Bay’s heavy duty 20 gauge housing is code gauge steel and all components are post painted with a glossy, high reflectance white, as well as a glossy green backbone because this fixture was designed to be environmentally friendly. Sockets include secure positioning rotating collars. The Green Hi-Bay’s superior lumen package is ideal for replacing traditional metal halide high bay systems. Benefits include high efficiency, 95% lumen maintenance, improved color rendering, extended lamp life, multi-level switching, instant on, dimming and improved uniformity. Suggested mounting heights from 15’ – 40’