•  Illuminating Engineering Society of North America
   www.iesna.org

•  The U.S. Green Building Council
   www.usgbc.org

•  LEED - Leadership in Energy and Environmental Design
   www.leedonline.com

•  International Association of Lighting Designers
   www.iald.org

•  U.S. Dept. of Energy's Office of Energy Efficiency and Renewable Energy (EERE)
   www.eere.energy.gov

•  Intertek
   www.intertek.com

•  ETL Listed Mark - Frequently Asked Questions
   www.intertek.com/marks/etl/faq/