Humans have inadvertently filled their towns and cities with outdoor lighting that generates a lot more light pollution than is necessary. This costs communities their starry nighttime views. It also ...

Thousand Hills State Park superintendent Ryan Persinger poses next to one of the park’s cabins. The flat, square light built into the cabin’s awning behind him produces less light pollution than the ...

Excessive outdoor lighting leads to light pollution, wasting energy and harming wildlife. Effective outdoor lighting directs light downwards, uses amber or orange bulbs, and keeps brightness to a ...