Once upon a time, buying a lightbulb meant choosing an incandescent one of between 25 and 100 watts, depending on how bright you wanted the light to be and the fixture you were putting it in. You ...

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 ...

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 ...