casing 12 into recess 62 webs 78 have ridges 79 extending longitudinally along the length of the front edge member 52 a second slot 80 extending longitudinally along the length of front edge member 52 is located under the parallel webs an angulated arm 82 extending from the members 81 forming second slot 80 is substantially parallel to the flanges 78 said angulated arm 82 having an elbow 84 at its midpoint and having a lip 86 at its end 88 lip 86 of front edge member 52 on each of the members 54 56 58 and 60 forms a surrounding edge 90 of the front face 20 of the front sign casing 12 which front face 20 is covered by flexible face material 22 front sign casing 12 also includes a series of regularly spaced c shaped bracing members 92 each secured between the top and bottom front casing members 54 56 each c shaped brace 92 is made up of a spanning member 94 and a pair of arms 96 which are angled and extending away from spanning member 94 and towards the second slot 80 of the front edge member 52 ends 97 of arms 96 are shaped to fit in second slot 80 and are secured therein with screw fasteners because the bracing members 92 are positioned between the illumination means 18 and the flexible face material 22 the closer they are positioned to the illumination means the less shadow will appear on the front face 20 of the sign members 92 are thus c shaped with the spanning member 94 being adjacent illumination means 18 the.