 In the field of POS displays, a "lightbox" is a display fixture (or a modular component of a larger POS display structure) that contains a translucent graphic film with lamps that transmit light through the graphic, thus "backlighting" the graphic message for increased visibility, brightness and contrast relative to its surroundings.By definition, the artwork or backlit graphic film (aka "duratrans") in a POS lightbox is replaceable without discarding the lightbox or any of its other components.Lightboxes have historically been lighted with fluorescent lamps due to their (a) cooler operating temperature than incandescent; (b) relatively efficient power consumption; and (c) inherent diffusive property.