The F138 Series luminaire shall consist of an injection-molded UV stabilized diffuser, a spun aluminum hood assembly, an internal optical system and a slip fitter (capital). The hinged hood shall rest on a ring welded to cast aluminum struts attached to the fitter with stainless steel hardware.. The diffuser shall be secured to the spider-leg fitter with stainless steel hardware. The internal ballast shall feature quick disconnect plugs for easy maintenance. The ballast shall be factory wired, tested and mounted on a keyholed cast aluminum plate together with a 4kV porcelain socket. Lamps are not included and shall be supplied by others. All electrical components shall be UL listed and labeled.