#Pittsburgh, #Pennsylvania, is replacing over 33,000 high-pressure sodium #streetlights with dimmable, 2700K white LED luminaires, which are "projected to save about $942,000 a year in energy costs while tackling #LightPollution."
Pittsburgh "plans to dim the new lights between 11 p.m. and 4 a.m., which will save energy and money, and, according to the city, cause less harm to migratory birds, urban wildlife and humans."
https://www.nytimes.com/2025/07/22/climate/pennsylvania-pittsburgh-light-pollution.html