Abstract: A display unit comprises a display stand—preferably of cardboard—having at least one marking (t/g) comprised of a material that fluoresces when irradiated with ultra-violet light, and an electrically operated source of ultra-violet light for irradiating said marking (t/g). The marking (t/g) may be on a surface of an open-fronted compartment of the unit and the ultra-violet light source may be partially shielded from extraneous light by a frontal lip of compartment. The unit may further comprise a box-like construction with a face having cut-outs defining stylised lettering. Behind the face is a fluorescent material visible through the cut-outs and at least one source of ultra-violet light, operation of which gives the appearance of the stylised letters being at the front of, and illuminated by, a lit chamber.