Site Lighting: Optical Systems Design and Application Guide for Site and Roadways
VII. APPLICATION IN DESIGN
Distribution Pattern Uses
Ideally, all light energy produced would be focused into desired
lighted zones with no wasted energy being directed elsewhere.
This would require an infinite array of distributions, and
the ability to tune them to every site condition. While this
is not realistic, the combination of careful luminaire selection,
mounting height, and luminaire placement can produce very
efficient designs, using just four basic distribution patterns,
as shown in Figure 9. For each of the basic distributions,
variations such as range and the characteristics of horizontal
vs. vertical lamp optics produce additional choices. Further
fine tuning can be attained with house-side shields and reflector
orientation.
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