In 1951, the first pre-lit Christmas tree was sold by a company called The American Home Products Corporation. This tree was a revolutionary invention that changed the way people decorated their homes for the holidays. Instead of having to string lights by hand, the pre-lit tree came with built-in lights that could be turned on with the flip of a switch. This convenience quickly made the pre-lit tree a popular choice among families and the company's sales soared. Today, pre-lit trees are still a popular choice for holiday decorating, with many different styles and sizes available.