When photographing a large home for holiday cards , the timimng of the evening was critical. The owners wanted to show the lights on at night and there is a window of 15 minutes or so when its just right. Before it was nice but sky was light blue. If I waited any longer it would have been black. I shot this with my Nikkor 14-24 2.8 lens. Its quite a piece of glass and so fast that I could do this hand held while standing on a ladder.