The F197 Series luminaire shall consist of a paneled diffuser, a cast aluminum body and an internal optical system. The hinged diffuser shall be secured with stainless steel hardware. The ballast assembly 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.