Untangling the History of Christmas Lights

(via Smithsonian) Today an estimated 150 million light sets are sold in America each year, adding to the tangled millions stuffed into boxes each January. They light 80 million homes and consume 6 percent of the nation’s electrical load each December. And though the contagious joy of these lights has been co-opted orange at Halloween and red at Valentine’s Day, it all started with Edward Hibberd Johnson’s miracle on 36th Street.