What is a LED?
This page contains links to fact sheets from the US Department of Energy describing solid-state lighting.
LED Basics
Comparing White Light LEDs to Conventional Light Sources.
Compares current LED products to conventional lighting on the basics: energy efficiency, life, lumen depreciation, light output/distribution, and color quality (4 pages, October 2008)
Color Quality of White LEDs.
Review of basics regarding light and color; summary of the most important color issues related to white light LEDs, including recent advances (2 pages, January 2008)
Thermal Management of White LEDs
Review of the role of heat in LED performance, and methods for managing heat in LED system design (2 pages, June 2009)
Energy Efficiency of White LEDs
Overview of lighting energy efficiency in general, and the rapidly evolving status of white LEDs (2 pages, June 2009)
Lifetime of White LEDss
Overview of lumen depreciation, measurement of LED useful life, and features to look for in evaluating LED products (2 pages, September 2009)
LED Frequently Asked Questions
What retailers, energy efficiency advocates, and consumers need to know to make informed buying decisions (2 pages, May 2011)