Of course in Copenhagen for their big outdoor Christmas tree.
http://www.youtube.com/watch?v=59JYRyzSfz4 Too bad pedalling by anyone can't go beyond Dec. 18th when the UN world climate change summit ends.

Maybe people will be too busy Christmas shopping, celebrating and eating.
Great idea for any of our major cities where there are lots of people to pedal-light it up nearly 24 hrs.?