Here is an example of the sort of thing I am talking about in the description section of this blog. Although there aren't actually any fingertips of light present, the general effect is the same.
It was shortly after sunset, and the sky was clear. The sky was still a deep and vibrant blue, and the horizon glowed orange.
The building site is not really all that pretty in daylight. It's all concrete beams and girders, but for a short time after sunset the yellowish lights made it stand out and look amazing against the blue and orange of the sky, and the reds and purples of the old magistrates court on the right. Add in the reflections from the river, and suddenly the ugly building site looks quite spectacular.