22 August 2006
Fully shielded or full cut-off
luminaires control glare
and reduce light pollution
Pole mounted metal halide, HPS, or
Coated metal halide,
Control with photocell,
timeclock, or motion sensor.
sodium lamp. Use low-
pressure sodium lamps in
sea turtle nesting areas.
CRITICAL DESIGN ISSUES:
Direct Glare: Fully shielded or full cut-off, flat-lens luminaires conceal the
light source and minimize the direct glare from the luminaire. Because the
eye adjusts to the brightest source in the field of view, eliminating glare is
the highest priority in designing for nighttime, exterior tasks.
Light Pollution / Trespass: The use of fully shielded or full-cutoff
luminaires eliminates direct light above the horizontal plane. Using full
cut-off optics and low wattage lamps can minimize light pollution.
Shielded luminaires minimize the chance of light trespass on a
neighboring property or building.
Modeling of Faces or Objects: By providing light from multiple directions,
objects and people are accurately rendered and modeled.
Reflected Glare: Wet surfaces often provide a surface that has the
potential for reflected glare. Select and locate luminaires and choose
surface finishes to minimize this as much as possible.