light pollution(redirected from Unenviromentally-friendly lighting)
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light pollutionOne of the factors setting a limit on the faintness of stars that may be seen, photographed, or observed or recorded by telescope. Light pollution is an excessive amount of background light mostly arising from human activities and includes street and domestic lighting, lighting of public buildings, factories, and offices, and lighting of entertainment and sports facilities used at night. Not all light pollution is of human origin, however. On a moonless night there are still three natural sources, of roughly equal contribution; these are airglow and other atmospheric effects, the zodiacal light arising from the scattering of sunlight by Solar-System dust, and the background light of our Galaxy. See also seeing.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The wasted light from building and landscape designs that produces glare, is directed upward to the sky, or is directed off the site.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved