Lighting Research Center, NLPIP Lighting Answers, LED Lighting Systems http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/led/abstract.asp Energy Savings Potential of Solid State Lighting in General Lighting Applications, Prepared by Arthur D. Little, Inc. for U.S. Department of Energy http://www.eere.energy.gov/buildings/info/documents/pdfs/ssl_final_report3.pdf The Promise of Solid State Lighting for General Illumination, Light Emitting Diodes (LEDS) and Organic Light Emitting Diodes (OLEDS) http://lighting.sandia.gov/lightingdocs/OIDA_SSL_Roadmap_Summary_2002.pdf