A device used to provide illumination by means of an electric current which excites mercury vapor in a glass tube, producing short-wave ultraviolet light that then creates fluorescence, producing visible light.
BLB (Black Light Blue) lamps use a special glass filter that absorbs almost all visible light and passes near ultraviolet energy. Thee are many industrial applications for these lamps such as photo-exposure and chemical reactions. They can also be used for the selection of minerals by fluorescence.
An example of an American lamp bulb used in Canada, part of a large and varied collection of over 7500 electrical items acquired and documented by Ontario Hydro in the 1960s. The collection was thought to be the largest and most comprehensive of its kind in Canada and was donated to the Canada Science and Technology Museum in 1992
Glass tube coated with white phosphor/ metal parts/ synthetic parts