The GTI PDV-2020e/SW Professional Desktop Viewer features Graphiclite T8 fluorescent lamps with a D50 light quality to provide a color correct viewing area for checking prints and other items that require precise color rendering. This model comes with side walls to ensure the most accurate space and has a hinged design that allows it to fold flat for transport or storage. This version also offers a vertical viewing area that measures 23.5 x 25.3".