07 Sep 2012:
LED Bulbs Widening Gap
In Energy Efficiency, Report Says
While today’s light-emitting diode (LED) bulbs are slightly better for the environment than compact fluorescent lamps, the energy efficiency gap will widen over the next five years
as the technology and manufacturing methods of LEDs improve, according to a new report. In an analysis of the impacts of the light technologies in 15 categories — including the energy and resources required to manufacture, operate, and dispose of the bulbs — researchers at the U.S. Department of Energy’s Pacific Northwest National Laboratory found that CFLs caused slightly more environmental harm than existing LED technologies in all but one of the areas studied. The one exception, they said, was hazardous waste generation because existing LEDs utilize a component, called a heat sink, which requires mining, refining, and processing of the aluminum. Improved efficiencies in emerging LED technologies, however, will reduce the amount of heat produced and, in turn, the size of heat sink required. As a result, they say, LED bulbs are expected by 2017 to have 50 percent less environmental impact than today’s bulbs and 70 percent less than existing CFLs. According to the lab’s analysis, consumers using either existing LED or CFL bulbs will reduce their environmental impact by three to 10 times compared with less-efficient incandescent light bulbs.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
A 2015 Yale e360 Video Contest winner captures stunning images of wild salmon runs in Alaska. Watch the video.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.