Four Bros Lighting HB-4/T5 4 Bay Lighting 4-Lamp Fluorescent Fixture High Output T5 HO, 120-277V 4 Lamp T5 Linear Fluorescent High Bay F54 T5 High Output Warehouse Lighting. Achieve maximum light quality with 95% reflection using Vega-95 Technology. Replace costly 400-Watt metal halide high bays (HID's) with this economical 4 Lamp T5 High bay Premium GE Ballast included in every fixture. Easy ballast access for convenient fixture maintenance. Pretreated metallic body that has been painted 5 times to withstand dust and corrosion.