The boom in AI and cloud computing is showing up in zoning conversations everywhere. Most of the public debate focuses on energy and water use, but there’s a quieter issue worth a seat at the table: industrial light pollution.
Our parent organization, DarkSky International, recently published a clear statement on responsible data center development. And although the idea of large AI data centers is a complex and controversial issue, there is room to speak to the implications of these projects vis a vis the light pollution they will generate. As the Olympic Peninsula grows, these are exactly the decisions our local zoning boards may face.
Why siting and design matter
The concern isn’t data centers as a category, it’s where they’re built and how they’re lit. A facility dropped into a naturally dark location can threaten the rare, hard-won darkness of places like certified International Dark Sky Places, and once industrial skyglow washes that darkness out, it’s nearly impossible to recover. In areas that are already developed, the question shifts from whether to build to how the site is lit. With a strong lighting plan, much of the light pollution a data center would otherwise create can be avoided from the start.
Four ways to cut the light pollution
For a facility in an appropriate location, the light pollution it creates is largely a controllable design choice. Brute force lighting is not the only option:
- Avoid over-illumination. Use the minimum light actually needed—empty lots don’t need to blaze like stadiums.
- Use an 80-degree cutoff. This keeps the beam tight and aimed where it belongs, preventing spill into neighborhoods and the glare that makes security cameras less effective.
- Add smart controls. Motion sensors and dimming can sharply lower light levels during the late-night hours when almost no one is on site.
- Choose warmer color (3000K or less). Blue-rich light scatters more and amplifies skyglow; warmer light protects wildlife and residents.
The results aren’t theoretical. Tucson, Arizona cut its total skyglow by 7% after a dark-sky streetlight retrofit, even as the city kept growing. Better lighting saves money, improves safety, and protects the night all at once.
Your Voice Matters
Contact Senators Murray and Cantwell and request they support S.4727, the Artificial Intelligence Environmental Impacts Act of 2026.
- Senator Patti Murray – (360) 205-2878 or write the Senator
- Senator Maria Cantwell – (202) 224-3441 or write the Senator
The Olympic Peninsula and Salish Sea region hold some of the darkest skies left in western Washington, and protecting them starts with people who show up. If a data center, subdivision, or streetlight retrofit comes before our local boards, informed voices make the difference.
Then connect with us at darkskyopwa.org to volunteer, attend an event, or stay in the loop on local lighting issues. The night sky over the Peninsula is worth keeping. Let’s make sure progress doesn’t cost us the stars.