This is a topic near and dear to my heart as I just hate light pollution and the negative impact it has on so many.
This map is so telling - I think it gives so much more information than just light pollution though (more lighting = more industrialization for example. You can zoom all the way into your specific area.
I was surprised by how little light pollution comes from some areas such as China for example where one might expect to see more. I suppose they have mastered the art of getting most of the population into a much smaller footprint.