Work across the aisle will protect Maine’s night sky | Nature Connects
Maine Passes First State Law to Combat Light Pollution, Effective Oct. 1, 2026
Sen. Stacey Guerin (R‑Penobscot, District 4) and Rep. Laurie Osher (D‑Orono, District 25) joined forces in the Legislature to enact a modest but comprehensive regulation aimed at preserving the state’s night sky.
The Maine Legislature adopted a new law that will take effect on October 1, 2026 to curb light pollution and protect the state’s dark skies. The bill, which gained support from legislators on both sides of the aisle, requires government-owned and publicly funded facilities to adopt responsible outdoor lighting practices for new or replacement installations. It also empowers municipalities to pass local ordinances and gives the Maine Office of Community Affairs the task of developing a model ordinance that towns can adopt.
The law is Maine’s first statewide measure to regulate light pollution. While it does not apply to airports, highways, publicly operated ski areas, seasonal holiday décor, or emergency or construction lighting, it does set standards for public outdoor sports facilities and other public spaces. The Department of Public Safety will be authorized to develop rules that address public safety concerns related to lighting.
“We are proud to have set aside our differences to protect a vanishing resource,” said Sen. Guerin. “Light pollution is an easy problem to solve, and it is the right thing to do for our environment, our health, and our economy.”
Why the Law Matters
Light pollution—glare, sky glow, and lights shining where they are not needed—has become widespread, leaving many North Americans unable to see the natural night sky. According to Dark Sky International, at least 30 % of outdoor lighting is wasted, leading to unnecessary energy consumption, higher greenhouse‑gas emissions, and higher electricity costs for residents and businesses.
Beyond the aesthetic loss of a star‑filled sky, scientists warn of the ecological harm caused by excessive artificial light. It can disorient sea‑turtle hatchlings, confuse migrating birds, alter amphibian reproductive cycles, and disrupt plant and tree phenology—contributing to the ongoing biodiversity crisis. Human health is also affected; exposure to artificial light at night can disrupt circadian rhythms and lead to sleep disorders and other health problems.
Maine’s clear, dark skies are a valuable natural asset. The state is already a popular destination for stargazers and eco‑tourists, and the global value of night‑sky tourism is estimated at $10 billion. Preserving the night sky could therefore boost Maine’s tourism economy while also protecting wildlife and human health.
How the Law Will Work
The new regulation requires that new or replacement outdoor lighting at public facilities:
- Point downwards to minimize sky glow.
- Be shielded to reduce glare.
- Use responsible light levels and a warm color temperature.
- Be turned off when not needed.
Bowdoin College’s new athletic field is cited as an example of a facility that has already met many of these standards. The law also provides a framework for municipalities that wish to adopt local ordinances. So far, 12 towns in Maine have already enacted such ordinances, and the state’s Office of Community Affairs is preparing a model ordinance to help more communities follow suit.
The Department of Public Safety will have the authority to issue rules to ensure public safety while still addressing light pollution concerns.
Bipartisan Support
The collaboration between Sen. Guerin, a Republican representing District 4 in the Senate, and Rep. Osher, a Democrat representing District 25 in the House, exemplifies a rare bipartisan effort. Both lawmakers emphasized the importance of protecting Maine’s natural heritage for future generations and highlighted that the legislation is “modest and practical,” aiming to balance environmental concerns with public safety.
Community Action
While the state law sets a standard for public facilities, residents can also contribute by using responsible lighting at home. This means directing light only where it is needed, using fixtures that shield light, and turning off lights when they are unnecessary. Communities are encouraged to discuss and adopt local ordinances that mirror the state’s standards.
Looking Ahead
The law’s passage marks a milestone in Maine’s environmental stewardship. By reducing wasteful lighting, the state can lower energy usage, protect wildlife, improve human health, and enhance its appeal as a dark‑sky destination. The new regulations are slated for implementation on Oct. 1, 2026, and Maine residents can look forward to clearer night skies in the coming years.
