The most popular Lithophane product is the plug-in night light. First invented in France in 1827, a Lithophane is a porcelain engraving that virtually comes alive when illuminated from behind! The image is created by a panel of different thicknesses of translucent, kiln-fired porcelain. A breathtakingly detailed picture in warm sepia tones emerge when lit. The small shadow in our pictures is due to photographic light and is not visible in your home. These illuminated artworks are so detailed, that they will amaze you for years to come. Our Night Lights are the perfect gift, reasonably priced and nicely gift boxed. Our exclusive clip mounting allows our Flat Night Lights to be plugged into any electrical outlet, including outlets that are installed sideways or upside down. Curved Panels can be mounted vertically. Each panel is approx. size 3.5 inches x 4.5 inches. The flat panels are interchangeable with any of the flat panel designs so you can change them easily or place into optional lamps. UL Listed."