Monoprice Ultra-thin Light Box for Artists, Designers and Photographers - Large 24.5-inch - (112085) Large 24.5-inch (22.4" x 14.6" x 0.3") View film transparencies, trace graphics, or even give yourself light therapy using this Ultra-thin Light Box from Monoprice! A light box has many uses, from film and photography, to outdoor advertising, to graphic design, and even to medical therapy. This LED light box features a 24.5" work space, as measured diagonally. Overall, it measures 22.4" x 14.6" x 0.3" and is powered using the included 12VDC AC adapter.