Dark skyists

Now this is an interesting group :-) People who try to reduce lighting in public places at night. Now, contrary to a lot of other groups like that, one can immediately see the reasons.
For sure, excessive lighting has been a trouble for astronomers since...since public lighting in cities was established? That's astronomers. But then it may be unpleasant in other ways as well.
See the picture, consider, how to sleep in these conditions? Not only animals are very sensitive to light, it's not healthy for people to sleep in light neither.
And then, consider the power consumption. According to the Czech Wikipedia, there are 126 226 public lights in Prague...