The F207 Series luminaire shall consist of a cast aluminum ballast compartment, a heavy cast aluminum shade and a refractive diffuser. The diffuser shall be secured to the gasketed luminaire body with a cast aluminum ring and shall feature a tool-free access via a spring-loaded latch.  The ballast shall feature quick disconnect plugs for easy ballast 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.