I am in the lighting business. This light polution issue is a growing one. Fortunately, there are many sensible solutions.
Lighting technology has grown to a point that you don't need to spend your energy dollar firing light up into the sky where it does no good. Go to a modern parking lot (if the owners/developer has embraced new technology) and check out the difference in where the light is directed. Modern commercial lighting doesn't need cause so much "noise" in the sky.