I cringe everytime someone sets up another bright brilliant unecessary outdoor light. Sometimes they can be just so obtrusive. When our town allowed a light industrial building to expand into residential zoned land one house away from us, their lights (which were not what was in the ZBA/planning board plans approved) literally lit up the inside of our house they were so bad. I did some research and sent off info to the planning board on lighting and light pollution. Our lighting problem was addressed and drastically reduced. They now use information from the sites I'd given them for other projects that come before them now.
http://www.darksky.org
http://cfa-www.harvard.edu/~graff/nelpag.html