We went out yesterday to see the effect of the Earth Hour campaign in the heart of Copenhagen (on Rådhudspladsen). Of course we knew that the best shot we could take of people/buildings turning their lights off is from a helicopter view over the city (or from the roof of some tall building). But when we got to the square, we were surprised to see that only a few buildings shut off the lights, whereas the rest of the buildings were still consuming energy as normal.
Here is the picture of a particular building (the one with the brands on) where you can clearly see the lights went off at exactly 20:30 (except the ground floor)
And this is how the same building (slightly different angle) looks with all the lights on.