The idea of electric lighting was not new. A number of people had worked on and even developed forms of electric lighting. But up to that time, nothing had been developed that was remotely practical for home use. Edison's achievement was inventing not just an incandescent electric light, but also an electric lighting system that contained all the elements necessary to make the incandescent light practical, safe, and economical. He accomplished this when he was able to come up with an incandescent lamp with a filament of carbonized sewing thread that burned for thirteen and a half hours.
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