Some people might think its the opposite of heavy pollution! But NO, Light Pollution is man made light that falls outside the area of intended lighting. Some examples are a street light that shines in your yard or your bedroom window and a billboard light that over shines the sign. Light pollution is the broad, glowing,dome of light we see over metropolitan areas, sports arenas, parking lots, or industrial complexes. It can also be a neighbor"s backyard light shining into your bedroom window throughout the night. Basically, light pollution is any unwanted, annoying, or unproductive light spewing into the night...
to your friend and neighbors so that they are aware of the wastefulness of inefficient and unnecessary outdoor lighting.

One group called OLPAC who are against light pollution has mission is to minimize the negative environmental impact and energy waste due to inefficient outdoor lighting in Ohio. Our principal tool for achieving this is education. By building awareness of light pollution, and about the value and effectiveness of well-designed lighting, we can make a difference. We can save energy, preserve dark skies, eliminate driving hazards, improve the appearance of our neighborhoods, and have save money at the same time.