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Arc lamp

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Carbon Arc Lamp

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Kohlebogenlampe - Carbon Arc Lamp

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Lighting up Carbon Arc Lamp of 1940s Cinema Projector FC1

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HOME MADE CARBON ARC LAMP

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Projector HID arc light mounted into a desk lamp

An arc lamp or arc light is a lamp that produces light by an electric arc. The carbon arc light, which consists of an arc between carbon electrodes in air, invented by Humphry Davy in the first decade of the 1800s, was the first practical electric light. It was widely used starting in the 1870s for street and large building lighting until it was superseded by the incandescent light in the early 20th century. It continued in use in more specialized applications where a high intensity point light source was needed, such as searchlights and movie projectors until after World War II. The carbon arc lamp is now obsolete for most of these purposes, but it is still used as a source of high intensity ultraviolet light.
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