History of Halogen Lamp

• A carbon filament lamp using halogen to prevent darkening of the envelope was patented in 1882 .

• The chlorine-filled "Novak" lamps were marketed in 1892

• The use of iodine was proposed in 1933

• Elmer Fridrich and Emmet Wiley developed the halogen lamp at General Electric in Nela Park, Ohio in 1955

• Elmer Fridrich developed the first halogen tungsten lamp prototypes with Emmitt Wiley in 1953/1959 .

• The team later developed the double ended halogen lamp in 1959 

• Patents were issued in 1959 .

• The halogen was improved upon by other engineers so that it was cheaper to produce and market in 1960. 

Definition of Halogen Lamp

A halogen lamp, also known as a tungsten halogen lamp or quartz iodine lamp, is an incandescent lamp that has a small amount of a halogen such as iodine or bromine added. The combination of the halogen gas and the tungsten filament produces a halogen cycle chemical reaction which redeposit evaporated tungsten back on the filament, increasing its life and maintaining the clarity of the envelope. Because of this, a halogen lamp can be operated at a higher temperature than a standard gas-filled lamp of similar power and operating life, producing light of a higher luminous efficacy and color temperature.

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