This UL-listed commercial grade fixture is made of heavy duty 24 gauge steel and finished with a white post painted baked on enamel. There is no ballast to maintain and LED bulbs have a life expectancy of 40+ years (running 4 hours/day). With Damp listed certification, long lasting durability, and unmatched brightness these lights are perfect for garages, storage sheds, warehouses, game rooms, barns, recreational spaces, workshops, and any area that would benefit from professional grade lighting without any maintenance. Attach to the ceiling, wall, work table or use a plug in adapter (not included) to move and keep anywhere. With no glass or mercury these LED bulbs are environmentally friendly and virtually unbreakable. Rest assured that when you purchase a 3 Lamp Bolt you are getting one of the pound for pound brightest lights on the market!