This time of year always bums me out. It seems like January 1 or 2 hit, and all the bright lights that make December so bright and vibrant just snap out immediately. But in this dark time of year, we need the lights to brighten things for us.
If you need a Christmas related reason, the 12 Days of Christmas actually run from Christmas to January 6, Epiphany, the day the Wise Men came and found the Christ child. AT least keep your lights on that long to brighten things up and fight the dark. It'll make you smile, I promise! :D