designed to receive a 400 watt metal halide lamp can very certainly receive a replacement metal halide lamp without having to adjust either an end reflective sheet or the fixture components for holding the lamp end reflector sheet 22 can be constructed from or covered with specular brushed defused hammertoned or other conventional reflective material and is preferably attachable to end wall 38 and parabolic reflector 27 illustrated in fig2 reflects light through the window covered by closure lens 25 end reflector sheet 22 is preferably attached so as to make an angle of approximately 68 u00b0 with the plane of intermediate wall 15 thereby providing efficient outward reflection of the light beam and focusing the light reflected by parabolic reflector 27 further end reflector 22 is preferably shaped so as to tangentially traverse parabolic reflector 27 thereby structurally supporting and maintaining the shape of such parabolic reflector although other methods of connecting end reflector 22 to end wall 38 are well known in the art one convenient method is by bolting a particularly convenient method of attaching end reflector 22 to parabolic reflector 27 illustrated in fig2 is providing end reflector 22 with tabs and punching slots in parabolic reflector 27 to accommodate such tabs when inserted therein end reflector 22 includes an aperture therein for access to lamp 12 so that it can be connected to or removed from electric socket 18 light support 16 is adjustably attached permitting longitudinal movement along longitudinal lamp axis 12 to end wall 39 although various conventional light supports may be used illustrated light support 16 preferably has desirable heat insulating.