http://www.lrc.rpi.edu/programs/solidstate/  - Lighting Research Center
http://www.iesna.org/   - Illuminating engineering society
http://www.darksky.org – International dark sky association
http://www.ledsmagazine.com/ - LEDs Magazine, the leading global information source for the LED lighting market.
http://light-building.messefrankfurt.com/frankfurt/en/besucher/willkommen.html - Light Building, leading fair in lighting industry
http://www.strategiesinlight.com/index.html  - Strategies in light, leading events for the global LED and lighting industry
http://www.sileurope.com/index.html - Strategies in Light, Europe

www.sdr.si – Lighting society of Slovenija
www.sloluks.si – Lighting institute and light planner