darksky.org: International Dark-Sky Association (Ida)
A non-profit member organization that teaches others how to preserve the night sky through factsheets, law references, pictures, and web resources.
iesna.org: Ies - Illuminating Engineering Society
IES (Illuminating Engineering Society of North America) - The Lighting Authority - Publisher of lighting design and illumination standards and National Electric Code for ...
Keywords: ies , illumination , lighting design , lighting information , lighting manufacturers
rosecityastronomers.org: Rose City Astronomers
Includes a information about the effects of light pollution and local darksky sites.
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