Designed for All Commercial Applications: Schools, Gymnasiums, Military Facilities, Retail and Warehouses . Highest Quality USA Programmed Start Electronic Ballast 120-277V, Top Three Manufacturers, UL Damp Rated. Multiple Wattage Combinations Available, 8x42, 6x42, 8x32, 6x32, 8X26, 6X26. High Power Factor THD< 10% Crest Factor< 1.7, Class A Sound Rating. Minimum Start Temperature 0°F, -18°C.