 Light
pollution is excessive or obtrusive light created by humans. It is
also a sign of wasted lighting energy. Light pollution can make it
difficult to see stars in the sky above cities. It can also interfere
with astronomical observatories, cause unwanted glare on surrounding
neighbors, and disrupt ecosystems. Since the early 1980s, a global
movement has been working to curb light pollution. One effective strategy
is to use full cutoff light fixtures outdoors. These units have no
direct uplight, help eliminate glare, and are more efficient by directing
all lighting down to the intended area only.
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