uses the latest multi-voltage electronic ballasts with T8 Graphiclite lamps. Their design has been enhanced to provide increased efficiency at a lower cost. All models come pre-assembled with a unique hinged design that allows quick and easy set up for viewing and equally fast fold-up for storage and/or transport. Accessory side walls, available for each model, are recommended for tighter compliance to the D50 industry viewing standard. These new models also provide significantly greater viewing areas compared with the previous models.