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Lamp bulb, discharge


Artifact no.
Mazda White
General Electric
Manufactured Date
Circa 1946
Context Function
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.
Context Technical
The Mazda lamp is an important example of social construction of technology. The introduction of high-efficiency Mazda lamps, trademark of Westinghouse/GE, was strongly opposed by electrical utilities afraid to lose the revenues from sales of electricity. The Mazda companies were forced to redesign the lamp.
Context Canada
An example of a 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
Number of Parts
Artifact Finish
White tube/ metallic and black end caps
Artifact Markings
Gold lettering on glass reads 'GE [logo]/ MAZDA 6W/ WHITE'
Artifact Missing
Appears complete
Group 1
Lighting Technology
Category 1
Lamp bulbs
22.5 cm