Contrary to popular belief, the light bulb wasn’t actually Edison’s invention. Light bulbs had already been invented before he was even born; what he did was buy the patent and improve the design so that light bulbs could be brought to the masses. The incandescent light bulb would be revolutionary, but only if Edison could solve one giant problem — bringing electricity to the homes of America. No matter how revolutionary his design improvements to the light bulbs were, no one can use a light bulb if there is no way to plug it in.