Design recommendations from industry associations


Nighttime Friendly designates products with superior optical control that are consistent with the goals of USGBC LEED® and meet Green Globes™ product criteria for light pollution reduction. These products are full cutoff and no more than 10% of the lumens from the luminaire are emitted above 80 degrees from nadir.
The Illuminating Engineering Society of North America provides a variety of reference material on effective outdoor lighting design. Both The IESNA Lighting Handbook, 9th edition, and Recommended Practice no. 33 (RP-33-99), Lighting for Exterior Environments, offer discussions on design practices and suggested spill light limitations. These and other reference materials may be purchased online at IES in the publications section.
NEMA  (Adobe Acrobat Reader needed for this link - download free copy from Adobe).
The International Dark-Sky Association is a grass-roots organization that promotes quality outdoor lighting practices. Of particular interest to IDA is the reduction of sky glow. Their guidelines are of significant benefit for lighting installations near astronomical observatories or intrinsically dark areas such as national parks.

Lithonia Lighting is a member of, and participates in the activities, of all of the associations, above.