Education and resources

Lighting zones

Resources

“Lighting zones“ (LZ) reflect the base (or ambient) light levels desired by a community. The use of lighting zones …

July 23, 2023

Glossary

Resources

A glossary of terms used throughout this site to describe lighting and its effects.

May 7, 2025

Software and mobile apps

Resources

Software and mobile apps can help us appreciate the night sky, measure light pollution, and much more.

December 2, 2025

Useful links

Resources

Some of the tools and sites we use from our partners, friends, and colleagues.

June 12, 2026

Videos

Resources

Enjoy watching some of our favorite videos on light pollution. For more videos on light pollution visit our YouTube …

February 24, 2026

DarkSky publications

Resources

Publications produced by DarkSky International.

July 26, 2023

Materials for public outreach

Resources

Download and distribute these free brochures, cards, infographics, videos, and more.

July 24, 2026

Measuring light pollution

Get involved

Solving light pollution requires measuring the brightness of the night sky. Learn how — become a community scientist!

July 5, 2026

Street lighting

Light Pollution

Streetlights can cause light trespass — light that falls where it’s not intended, wanted, or needed.

August 19, 2025

My neighbor’s lighting: What can I do?

Resources

Many of us have experienced this situation: a neighbor installs a new outdoor light fixture that shines onto your …

July 5, 2026

Dark sky friendly outdoor lighting for policy makers

Resources

In an average year in the U.S. alone, outdoor lighting uses about 380 terawatt-hours of energy, mostly to illuminate …

August 30, 2023

Responsible outdoor lighting

Resources

Too often, outdoor electric lighting installations at night are over lit, are left on when not needed, and are …

August 11, 2023