when did the first light bulb get invented
Thomas Edison After many experiments, first with carbon filaments and then with platinum and other metals, Edison returned to a carbon filament.[53] The first successful test was on October 22, 1879;[51]:186[54][55][25] it lasted 13.5 hours.[56] Edison continued to improve this design and on November 4, 1879, filed for U.S. patent 223,898 (granted on January 27, 1880) for an electric lamp using "a carbon filament or strip coiled and connected to platina contact wires".[57] This was the first commercially practical incandescent light.[58]
Christmas lights The first known electrically illuminated Christmas tree was the creation of Edward H. Johnson, an associate of inventor Thomas Edison. While he was vice president of the Edison Electric Light Company, a predecessor of today's Con Edison electric utility, he had Christmas tree light bulbs especially made for him. He proudly displayed his Christmas tree, which was hand-wired with 80 red, white and blue electric incandescent light bulbs the size of walnuts, on December 22, 1882 at his home on Fifth Avenue in New York City. Local newspapers ignored the story, seeing it as a publicity stunt. However, it was published by a Detroit newspaper reporter, and Johnson has become widely regarded as the Father of Electric Christmas Tree Lights. By 1900, businesses started stringing up Christmas lights behind their windows.[14] Christmas lights were too expensive for the average person; as such, electric Christmas lights did not become the majority replacement for candles until 1930.[15]