"Studies suggest that a complete conversion to the [light-emitting diode, or LED] lights could decrease carbon dioxide emissions from electric power use for lighting by up to 50 percent in just over 20 years; in the United States, lighting accounts for about 6 percent of all energy use. A recent report by McKinsey & Company cited conversion to LED lighting as potentially the most cost effective of a number of simple approaches to tackling global warming using existing technology."
Elisabeth Rosenthal and Felicity Barringer report for the New York Times May 29, 2009.
"Green Promise Seen in Switch to LED Lighting"
Source: NYTimes, 06/01/2009