inherent resiliency of the panels to be retained in channel 143 similarly bottom flanges 144 and 145 on the panels are squeezed and then released to fit within a retaining channel 146 formed in bottom flange retaining rod 129 panels 122 and 123 have their interior surfaces positioned over panel backing retaining rods 130 and 131 when the flanges are positioned in channels 143 and 146 to assist in maintaining the cylindrical shape of the panels panels 122 and 123 are preferably formed from a thin resilient sheet material such as thin sheet metal that can be shaped into a pliable semi cylindrical configuration and folded along its long edges to form top flanges 140 141 and bottom flanges 144 145 still referring to fig1 and 2 a light source preferably in the form of bulbs 161 and 162 retained in sockets 162 and 163 is mounted to a light source rod 150 which is inserted through frame end bracket 151 of frame 20 along rotation axis 8 of cylinder 4 to position the light source within the interior of the cylinder bulb sockets 162 163 are attached to rod 150 by brackets 164 and 165 respectively rod 150 is fixedly secured to frame 20 at end bracket 151 by collar 152 quiet and smooth rotation of cylinder 4 by motor 121 about axis 8 is achieved using a rotator bushing 153 that rotatably supports end plate 127 of the cylinder as shown in fig2 wires 155 to supply electrical power to bulbs 161 and 162 enter the interior 6 of cylinder 4 through aligned openings in end plate 127 bushing 153 end bracket 151.