Electric light bulbs had been around for decades by the 1870s. Most demonstration systems used arc lamps, which seemed far too bright and burned much too hot for indoor household use. In 1878, Thomas ...

Edison Light Bulb, 1879, Smithsonian's National Museum of American History Thomas Edison used this carbon-filament bulb in the first public demonstration of his most famous invention—the light bulb, ...

Inventor Thomas Edison demonstrated his electric incandescent lights in public. He illuminated about 100 bulbs in and around his laboratory in Menlo Park, New Jersey. Edison used a carbonized bamboo ...

More than a century before graphene was isolated in a modern lab, Thomas Edison may have been unknowingly making the wonder material inside his early light bulbs. New experiments suggest that the ...