STUDY FINDS FOR LED LIGHTS

LEDs Are As Energy Efficient as Compact Fluorescents
Eric Taub, August 4, 2009 (NY Times)

"While there’s no question that LED lamps use a fraction of the energy to produce the same amount of light compared with a standard incandescent bulb… that’s only half the story…If the energy used to create and dispose of the LED lamp is more than that for a comparable standard bulb, then all of the proclaimed energy savings to produce light are for naught.

"…In March, a preliminary study reported by Carnegie Mellon indicated that LED lamps were more energy efficient throughout their life…A new study released on Tuesday by Osram, the German lighting giant, claims to have confirmed the efficiency findings."

from Wikipedia - click to enlarge

"Conducted by the Siemens Corporate Technology Centre for Eco Innovations (Siemens is the parent of Osram and Sylvania), the report examines the energy needed to create and power an LED lamp. Even the energy needed to ship a lamp from the factory in China to an installation in Europe was taken into account."

from Wikipedia - click to enlarge

"The study used a 25,000-hour LED lamp life as a constant, comparing the energy needed throughout its life to that used for 25 1,000-hour incandescents and 2.5 10,000-hour compact fluorescents.

"The findings…today’s LED lamps are essentially as energy efficient as compact fluorescents, in the amount of energy needed to create, recycle and provide light…[And] those numbers to improve as LEDs become more energy efficient…[More] confirming data will be released this fall, after review by three independent analysts…[A]ssuming the numbers hold, this total Life Cycle Assessment should put to rest any lingering doubts about the overall “greenness” of LEDs."