In the time of darkness surrounding the winter solstice, candles were important as a source of light and heat. Romans lit candles to convince the sun to shine again and to ward off evil. From this pagan start, the candle has gone on to become the essential part of Christmas lighting, both in church ceremonies and at home.
In Victorian times candles came to represent concern and good will for the poor and unfortunate during the holiday season. Candles were placed in windows over the twelve days of Christmas as a sign to the needy passersby's that shelter and warmth could be found within
For Christians it symbolized Christ himself, the light of the world.
It also can represent a mirror of starlight reflecting our thanks for the Star of Bethlehem.
In Sweden, St. Lucia appears wearing a crown of candles.