Illuminating display window and merchandiser display unit comprising same

A refrigeration device comprising:

• a cabinet having a doorway;
• and
• a door for selectively opening and closing the doorway, the door comprising:
• a front window pane having a perimeter edge margin;
• a rear window pane substantially parallel to the front window pane, the rear window pane having a perimeter edge margin, the rear window pane being spaced from the front window pane along an axis;
• a graphic element comprising a fluorescent material, the graphic element being supported on the door at a location (i) inboard of the perimeter edge margin of each of the front window pane and the rear window pane and (ii) between the front window pane and the rear window pane along the axis, the graphic element having a major surface facing forward a rear surface spaced from the major surface along the axis, and a perimeter surface extending from the major surface to the rear surface;
• and
• an electromagnetic radiation source configured to emit electromagnetic radiation having a wavelength in a non-visible spectrum, the electromagnetic radiation source supported on the door at a location (i) adjacent the perimeter edge margin of the window pane, (ii) between the front window pane and the rear window pane along the axis, and (iii) spaced from the perimeter surface in a plane substantially parallel to the front window pane and the rear window pane,
• wherein the electromagnetic radiation source is configured to emit the electromagnetic radiation through a fluid filled space to the perimeter surface of the graphic element, whereby the graphic element fluoresces to transmit visible light that is visible to an observer in front of the door, the fluid filled space being between the front window pane and the rear window pane along the axis.