On the Earth Day's eve, the 21st April at 21:00 after the sunlight faded, a clear message through the lights of the dormrooms in Prague was created:

21:00: An incandescent ligtbulb with rather high energy consumption 



21:30h: a fluorescent lightbulb with approx. 5-times lower energy consumption


Change in the world is created always by a small group of people!



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