Dark Sky Lighting
Choose Dark Sky Lighting to eliminate glare and comply with local light pollution ordinances. An outdoor light fixture is considered dark-sky if it emits all of its light downward, and no part of the bulb is visible from a distance. No light may be emitted above the 90 degree horizontal.
When looking for Dark-sky outdoor lights, ask for Fully-Shielded or Full Cutoff. If you can see the light source, then it likely is NOT a dark-sky light fixture.
Dark Sky Benefits
Dark sky compliant fixtures give 4 main benefits:
Avoid Light PollutionLight pollution definition is an "excessive, misdirected, or obtrusive artificial light. "(Wikipedia) Really it is excessive lighting emitted into the atmosphere that serves no purpose and is wasted. It gets worse because this excessive light is actually harmful to nocturnal animals and star-gazers everywhere. Stop contributing to city glow by selecting a dark-sky outdoor light.