Electric Light Invented

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Electric Light Invented
Thomas Edison overcame the obstacle to finding a light bulb that would burn long enough to become commercially viable by developing of a bulb based on carbonized cotton. The invention of the light bulb began the electrical revolution that soon swept the country and the world.
On October 21, 1879, Thomas Edison successfully concluded his quest for a practical electric bulb. The new bulb he designed, using a filament of carbonized cotton, burned for 13 hours before Edison turned it off.