National Lighting Bureau
Science, Technology, Lighting, Associations - National Lighting Bureau. The NLB is a non-profit but industry sponsored US lighting information source, focusing on the quality of lighting.
https://www.nlb.org/
International Association of Lighting Designers
Science, Technology, Lighting, Associations - International Association of Lighting Designers. The IALD provides education and networking for architectural lighting designers.
http://www.iald.org/