This round, recessed luminaire has an 11 3/8-inch-deep housing, fabricated from die-formed 20-gauge steel. For use with T5HO, T8, or Biax lamps and programmed-start and instant-start electronic ballasts, the extruded aluminum frame adds strength to the fixture. Available in 2- to 6-foot diameters, the standard housing finish is gloss white and the standard exterior trim color is textured matte white. Concave, convex, or flat lenses are available.