Mirrors give Winter light to Rjukan.
A small town in Norway has had three large mirrors installed on a hilltop to reflect sunlight to the town, which gets no direct sunlight over the winter months.
The mirrors are computer controlled to move throughout the day to keep a small patch of light on the town square. The idea was initially thought of a hundred years ago by an engineer working in the town, which was established to provide workers to the nearby power plant.
The Italian town of Viganella has had a similar system in place since 2006.