22 gen 1879 anni - Long lasting bulb

Descrizione:

After many experiments, Thomas Edison (United States) invented an incandescent light bulb that could be used for about 40 hours without burning out. By 1880, his bulbs could be used for 1,200 hours.
Electric lights (Brush arc lamps) were first used for public street lighting in Cleveland, Ohio.
California Electric Light Company, Inc. in San Fransisco was the first electric company to sell electricity to customers. The company used two small Brush generators to power 21 Brush arc light lamps.

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