bulbs.com

oB1GR TIL that Thomas Alva Edison did not invent the light bulb; electric light sources were being experimented since early 1800s and an English Physicist Sir Joseph Swan had a working prototype of electric incandescent light bulb more than a decade earlier than Edison.
pL9Q TIL Thomas Edison did not invent the lightbulb and that electric lights had already existed for more than 70 years before he filed his patent in 1878