Illuminated trees

If you live in a place where half of the year the trees look like dead without their leaves and where grey daylight is visible only from 10 to 2 you have to be creative. So somebody invented the illuminated trees a couple of years ago.
It's nice and definitely an eye catcher. During the days of the UN world climate change conference it's questionable somehow, though.
Well...most things in life are a compromise between reason and fun :-)