light pollution

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light pollution

One 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.

Light pollution

The wasted light from building and landscape designs that produces glare, is directed upward to the sky, or is directed off the site.
References in periodicals archive ?
But try to avoid the mistake of over-lighting every shrub or feature.
But I would have to thin carefully to avoid over-lighting the forest floor and encouraging so much low-growing vegetation that the wildflowers couldn't compete.
With built-in nLight controls, the RTLED can be configured to perform intelligent tasks--including dimming themselves by Lumen Maintenance, a means of eliminating the waste associated with over-lighting early in its life cycle.
No LED fittings could meet our tight specification, as it needed to be a 5-to 10-deg source to avoid over-lighting the medallion itself," explains Bird.
Over-lighting will destroy the feeling of intimacy so in entertainment areas use candles and lanterns.
Solar energy also provides passive heating, while minimizing cooling requirements during the summer associated with over-lighting from sunlight (over-lighting provides light levels above minimum standards, and should be avoided during the cooling season).
Digital Lumen Management" addresses how LED lighting reduces over-lighting by maintaining a constant level of light throughout the life of the system.