the walls a polished anodized aluminum is one suitable material the walls 68 and reflective surface of the cup 66 isolate the light from the lamps 30 and 32 the up lamp 30 shown as an hid metal halide lamp in fig4 and 7 and its electric socket lamp receiver 69 see fig4 are housed within the interior of the cup 66 the walls 68 of the cup 66 have an upper flange 70 that is fastened to a top plate 72 the top plate 72 has an opening 74 in the center and a generally octagonal outer periphery sized larger than the opening 64 in the annular flange 60 so that it overlaps the annular flange 60 and supports the cup 66 the top plate 72 has a vent section 73 for cooling the ballast 52 a cover plate 76 mounts onto of the top plate 72 by two clips 78 to cover the opening 74 in the top plate 72 the cover plate 76 can be removed to access the up lamp 30 by loosening the fasteners securing the clips 78 the cover plate 76 can be made of glass or other light transmissive material either transparent or translucent so that light from the up lamp 30 can pass through it a vertical hanger 79 is mounted to the tray flange 70 holding a socket lamp receiver 80 for the down lamp 32 which is electrically connected to the ballast 52 the hanger 79 and socket 80.