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The nighttime sky can be dramatic. Light
intrusion and overlighting glare
can obscure what little night sight is available to humans. Care is
required to limit night lighting to the minimum necessary for
safety. Low voltage lighting with
photovoltaic collectors should be considered as an
energy-efficient alternative. Light fixtures should remain close to
the ground, avoiding glare from eye level fixtures.
Light pollution reduction can also
be achieved through reduced dependence on high-wattage electrical
lighting at night by using solar lighting and light-colored or
reflective edges along driveways and walks and by designing
night lighting to prevent direct-beam
illumination from leaving the building site. As an additional
benefit, these measures preserve nighttime habitats for nocturnal
species.
The minimal lighting requirements of operational environments may
take precedence over this sustainable design goal for certain
developed areas of the base.
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