Illuminated Backlit Poster Light Box LED Backlit Movie Poster Frame The light box is backlit using LED strips located on the sides of the frame behind the poster. Easy-to-use drywall mounts included in your purchase The back lit poster frame is 29.5 inches wide and 42 inches long while only 1 inches thick! The poster frame is composed of a special light diffusing optic acrylic backing, and a clear protective acrylic lining. The poster is sandwiches in between these two pieces for optimal visual effect. The use of this double-acrylic design means no tape, or adhesive is needed to keep the poster in place. Your electric bill doesn't have to suffer! Traditional light boxes typically use fluorescent bulbs which require more power to run and therefore use more electricity per year.Our LED Movie Poster Frame's offer a 46% electrical savings over traditional florescent light boxes!