The April issue of Parks & Recreation has a one-page article in its Operations section by Lindsay Collins titled "Illuminating Solutions to Light Pollution". Some quotes...
...excess output of light from buildings, streetlamps and sports stadiums and fields is not only a nuisance, but also a culprit that wastes energy, disrupts ecosystems, alters wildlife behavior and has detrimental effects on human health...In recent years, many manufacturers have worked to develop lighting systems that are more effective for their intended purpose while eliminating many of the undesired effects.
The bane of every astronomer's existence.
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