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An antique carbide lamp is filled with calcium carbide and water in two different chambers and lit. The flame size is regulated by the amount of water flowing into the carbide chamber.
Carbide lamps (acetylene lamps) are simple lamps that produce and burn acetylene by reacting calcium carbide with water.
These lamps were formerly found in mines (not to be confused with the Davy lamp), vintage cars, and lighthouses; they are still sometimes used by cavers. The acetylene is generated by adding calcium carbide (CaC2) pellets to water. The design of the lamp was first patented in Duluth, Minnesota on October 21, 1902 (U.S. patent 711,871).
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