Christmas lights are lights often used for decoration in celebration of Christmas, often on display throughout the Christmas season including Advent and Christmastide. The custom goes back to when Christmas trees were decorated with candles, which symbolized Christ being the light of the world. This custom was borrowed from pagan yule rituals that celebrate the return of the light of the sun as the days grow longer after solstice: the evergreen trees symbolising the renewal and continuance of life in dark times. The Christmas trees were brought by Christians into their homes in early modern Germany.
