Die formed heavy gauge steel housing with high-gloss baked white enamelfinish over rust inhibiting phosphate coat. Fixture is shipped fully wired. Ample knockouts provided. Fully wired for 120-277V, 60 Hz AC operation with ETL-CBM, thermally protected, automatic resetting, Class P, sound rated A, programmed-start, electronic T5 HO or T8 ballast. High ballast factor T8 ballasts are also available. The 6 lamp unit contains 1-(2) lamp and 1-(4) lamp ballast. UL listed.