and other portions may have the embodiment shown in fig4 all of this being well within the scope of the present invention as previously mentioned the term 34 light source 34 is used broadly in the present application referring now to fig8 can be seen that an incandescent light source generally designated by the numeral 58 and including a plurality of incandescent lamps 59 screwed into sockets 60 in lamp base 61 provide the source of light the lamp base 61 is mounted by means well known in the art to the raceway cover 45 which as before is mounted to the support shelves 35 by the screws 37 received in the screw receiving slots 32 now referring to fig9 it is believed that in instances for special lighting effects a neon light source generally designated by the numeral 65 may be desired in place of either the incandescent light source 58 or the fluorsecent light source 46 previously described in this embodiment the neon light source 65 consists of a neon lamp base 67 mounted to the raceway cover 45 by conventional means and having the desired number of neon lamps 66 mounted thereto the neon lamps may be all of the same color or may be varied in color depending upon the particular application thus far the modifications to my construction dealing with substitution of light sources has been directed to obtaining different lighting effects however referring again to fig4 it can be seen that modifications to my invention can be made to vary the direction of the light as well.