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also, arc lamp. a lamp in which the light source is a high-intensity electric arc either between carbon rods in air or between metal electrodes in a xenon gas atmosphere enclosed in a quartz bulb.
the light produced by such a lamp.
historical examples

an arc lamp operated in this way is called an enclosed arc lamp (fig. 8).
encyclopaedia britannica, 11th edition, volume 16, slice 6 various

to ill-strate this, let us take an arc lamp designed to use a 50-volt current.
electricity for boys j. s. zerbe

and now rhoda gray was in the radius of the arc lamp, and distinctly visible to any one coming down the yard.
the white moll frank l. packard

the point between reality and unreality is the arc lamp in the street.
fantazius mallare ben hecht

all such commonly used expressions as “an arc lamp of 2000 candle-power” are, therefore, perfectly meaningless.
encyclopaedia britannica, 11th edition, volume 16, slice 6 various

the arc lamp has shone like a sun to-day over a happy company.
farthest north fridtjof nansen

smith turned to me, and his face was tragic in the light of the arc lamp swung hard by.
the devil doctor sax rohmer

this is simply an arc lamp with reflectors behind it and lenses in front of it.
the library of work and play: electricity and its everyday uses john f. woodhull

once a curiously-hatted policeman stared blankly at them under an arc lamp as the staff car clanked and rumbled past him.
the invaders william fitzgerald jenkins

he touched the photograph she had given him, and held it up as he p-ssed under an arc lamp to be sure of it.
the main chance meredith nicholson

noun
a light source in which an arc between two electrodes, usually carbon, produces intense white illumination also called arc lamp
arc lamp
an electric light in which a current produces light when an arc traverses the gap between two incandescent electrodes in a container filled with a gas, such as xenon. the two electrodes are usually made of carbon and are eventually vaporized by the heat they generate. arc lamps are used to produce intense light (as in spotlights) and to produce heat for welding.