Edison and his team of researchers in Edison's laboratory in Menlo Park, N.J., tested more than 3,000 designs for bulbs between 1878 and 1880. In November 1879, Edison filed a patent for an electric lamp with a carbon filament. Still life of the first electric light bulb, invented by Thomas Alva Edison in 1879 and patented on January 27, 1880. Though he didn't come up with the whole concept, his light bulb was the first that proved practical, and affordable, for home illumination.

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