Jan 25, 2014
The Illuminating Engineering Society of North America (IES)
Lighting China
U.S. Department of Energy
The Lighting Association
Energy Saving Trust
LEDinside
LEDs Magazine
LED Journal
LIGHTimes Online
Lighting Directory
Compound Semi Online
Lighting Resource
International Sign Association
American Lighting Association
SPIE The International Society for Optical Engineering
OIDA – The Optoelectronics Industry Development Association
LIGHTFAIR International
SignIndustry
SignWeb
Lighting.com
Lighting Systems Research Group
Lighting Research Center
Light Guide: Useful Formulas
The Lighting Research Center (LRC)
Lighting Design
Lightsearch.com