Fluorescent High Bay Lighting Fixture; Type Heavy Duty Channel; Lamp Type F54T5HO/841; Number of Lamps 6; Lamp/Ballast Voltage 120 to 277 V at 50/60 Hz; Ballast Type (2) Electronic, Programmed Rapid Start; Length 48-1/16 Inch; Width 18-1/8 Inch; Height 2-3/8 Inch; Distribution Type Narrow; Ballast Configuration (1) 2-Lamp Ballast and (1) 4-Lamp Ballast; Approval UL, CSA; Applications Include Manufacturing, Warehousing, Commercial, Industrial Facilities