You can easily have 10 times as much light coming down from an overcast sky…. Sites where the atlas shows a baseline clear-sky brightness equivalent to twilight or a half-illuminated moon are probably excluded as habitats for specialist species that need the true cover of darkness to survive and thrive.
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Incentivizing conversion to cheap blue-white LEDs is a colossal policy mistake.
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If I as a university professor approached my institutional review board and said I want to experiment on entire populations by introducing wavelengths of light most associated with harmful biological and ecological effects, they would laugh me out the door, down the street and out of my office,” Longcore says. “Fortunately, we can now use much warmer-colored LEDs that eliminate the blue spike in spectrum that is so damaging because it scatters so much in Earth’s atmosphere.