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Helios direct current flaming arc lamps ... (1910)

Helios Manufacturing Co. · Helios Manufacturing Co. · leaf 6

An illustration from Helios direct current flaming arc lamps ..., 1910, leaf 6
singlelamp on 110 volts or only 2 on 220 volts, additional resistance must be pro-vided to redu< e the Line voltage, and, while we separately list such lamps, therept in the amount of the resistant e, and in either case thetained. CL When operated in tins manner, the efficiency ol each Lamp is…

Lighting · Light fixtures · Arc lamps

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