This is a low profile T5 fluorescent fixture. Its fully assembled housing is formed and welded, 20 ga. steel, chemically treated to resist corrosion and enhance paint adhesion. Standard finish is high reflectance white powder coat, applied post production. Available for one or two T5 14W, 21W, 28W, 35W and high output 24W, 39W, 54W, 80W linear fluorescent lamps. Standard 120V or 277V, 50-60Hz electronic high power factor ballast is pre-wired to the lamp holders.