Lighting: the LED Revolution is Upon Us

After will be quietly introduced in signs and lights of our vehicles, LEDs are preparing to establish itself in the city and in our foyers. And they have it all…

The signs do not deceive. In Germany, the city of Darmstadt has already replaced many streetlights from a residential area by the luminaires equipped each of 86 LED (( Light Emitting Diode) high power, with lenses and reflectors. In Los Angeles, Mayor Antonio Villaraigosa announced the replacement of 140,000 bulbs of the megalopolis of 4 million inhabitants by emitting diodes. « This program renovation is the most ambitious in the world ever undertaken by a municipality. It should reduce our emissions of carbon dioxide of approximately 40,500 tonnes per year, equivalent to remove 6,000 cars traffic “, said the Mayor at a press conference given on 16 February in the presence of former president Bill Clinton, today at the head of the Clinton Climate Initiativea branch of his Foundation created in 2006.

And the France? She will feel… The agglomeration community of the Val de Fensch (Moselle), decided late last year to install three street lights LED in its Park of Sainte-Agathe. Energy savings seem more wooed in private, since the insurer Generali lit now exclusively LED the 18,000 m² of offices on the Champs-Elysees.

Far From Negligible Savings

Because economies are at the rendezvous. With a duration average life of 50,000 hours, LED bulbs (link: http://www.ledlightsclassified.com/how-to-choose-a-led-bulb/) are five times more durable than conventional low traditional consumption, which they only consume 20% of the energy. The cost of returns hourly facing the incandescent bulbs becomes almost negligible with 0.04%, especially as the devices led now equals the best CFLs and that Research is far from having said its last word in the field.

The LED high power originates in the invention of the blue LED by the Japanese Shuji Nakamura in 1992. This technology was quickly, in association with the red and green LEDs, designed to achieve a white light. Subsequently, Moore’s law similar to that dope computing enabled the doubling of their power every two years, and evolution is far from over. At the same time, engineers are working on ranger among the bad memories the “coldness” of the first LED their giving a spectrum emission similar to incandescent lighting, or better, to the light natural.

A new revolution is already looming on the horizon with OLEDs (Organic light-emitting diode), composed of three layers of a Semiconductor organic surrounded by a cathode metal and a anode transparent. These have the advantage of being produced in film of less than 1 mm thick which can cover a Wall whole, or even a ceiling, producing light of color changing. Remains to increase the lifetime (12,000 hours currently) and reduce the still high cost of production. But the progress is running…

End of 2009 will see the final withdrawal of the sale of incandescent bulbs, at least in the strongest powers, with a view to total ban in 2012. The traditional light bulb is up to the prehistory, we bet that you will not regret it.

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