Taking Back the Night Sky

Protecting the night sky does not require cities to go dark. It requires using light with greater intention. Every homeowner, business, and property manager has the ability to reduce unnecessary light pollution through a few practical decisions that improve efficiency while preserving the natural nighttime environment.

The most effective change is ensuring outdoor lighting points downward. Fully shielded fixtures direct light only where it is needed—onto walkways, driveways, and entrances—instead of allowing it to spill into the sky. Light emitted above the horizon contributes little to visibility while significantly increasing skyglow, reducing our ability to see the stars.

Equally important is limiting the amount of time lights remain on. Motion sensors, automatic timers, and astronomical photocells ensure lights operate only when they serve a purpose. An empty parking lot or backyard does not require continuous illumination throughout the night. Turning lights off when they are no longer needed saves energy, reduces costs, and restores darkness for both people and wildlife.

Modern society has increasingly associated brighter lighting with greater safety. While appropriate lighting is important in specific situations, excessive or poorly designed lighting does not necessarily deter crime. In many cases, glare from overly bright fixtures can reduce visibility by creating harsh contrasts and deep shadows where people and security cameras struggle to see clearly. Well-designed, targeted lighting is often more effective than simply adding more light.

Artificial light also disrupts the natural world. Many migrating birds, nocturnal mammals, insects, and pollinators depend on darkness for navigation, feeding, and reproduction. Every unnecessary light left shining through the night contributes to a growing environmental problem that extends far beyond a single property.

The night sky is a shared natural resource. Preserving it begins with individual responsibility. By choosing fully shielded fixtures, installing timers or motion sensors, using only the amount of light necessary, and switching lights off when they are no longer needed, each of us can help reduce light pollution while maintaining safe, functional outdoor spaces.

Small changes made by millions of people have the power to restore the stars.