Lithonia Lighting IBZT5 6 6-Light T5HO Contractor Select Fluorescent High Bay, White Rugged fixture construction coupled with excellent fixture performance Suitable for suspension by chain, cable, hook monopoint or pendant monopoint Channel is formed of heavy-duty, code-gauge steel to stand up to the most demanding elements Energy efficient linear fluorescent light technology provides general lighting for a variety of applications Steel construction in gloss white Uses 6 54 fluorescent t5\t5ho fluorescent bulbs, sold separately 120-277 volt fluorescent electronic ballast Built to last