Incandescent bulbs could become an option for the future.
As the market manufactures more and more designs of lamps and lighting using the latest technologies in led lights to save on electricity. The researchers of the MIT (Technological Institute dand Massachusetts) have discovered how to make more efficient light bulbs fromincandescent bulbs, those that we no longer want to see, because now they could become an excellent solution with a potential to increase efficiency up to 40%.
From the EU, sales of the Incandescent bulb leaving many traditional lamps in disuse. Let us remember that a European Commission Directive aimed at withdrawing high-consumption appliances from the market, scarce energy efficiency and gradually improve labeling. (See two articles of interest: calculation of home energy consumption - regulatory lighting and efficiency control)
It was a true progressive incandescent blackout, which had been programmed by the EU for some time (La Ecodesign Directive 2009/125 / CE). The 100 W bulbs expired in 2009, the 75 watt ones in 2010…. 2011, 2012.
In Europe, you can no longer get the most inefficient ones and only the halogens with a higher ratio of lumen per watt (lm / w) they have achieved a moratorium until 2022.
If we consider that the luminous efficacy of the incandescent bulbs Conventionals are between 2 and 3 percent, that of fluorescents (including compact fluorescent lamps) is between 7 and 15 percent, and that of most LEDs commercial between 5 and 20 percent, Future incandescent bulbs, scientists say, could achieve efficiencies of up to 40 percent and display more natural colors than more modern bulbs.
Traditional incandescent bulbs feature a "Color rendering index" rated at 100, because they match the color of objects seen in natural light. However theLED or fluorescent bulbs It can only handle a classification in the index of 80 and most that we can find in the market are much less, without counting the housing that many LED lamps form.
Now scientists have come up with a solution that could provide a breather for forgotten incandescent bulbs. The MIT researchers have shown that by surrounding the filament with a special crystalline structure, such as "photonic crystals", the glass can recover energy that is normally lost in heat., while still allowing light to come through. They refer to a technique called "recycling light" where the energy that would normally escape into the air is redirected to the filament where it can continue to create new light.
Definitely… "Recycle energy that would otherwise be wasted"according to one of the project scientists, Marin Soljacic.
The reality of the discovery is not so much improving incandescent bulbs, which can be one objective among others, it is actually understanding the ability to control thermal emissions. That is the true contribution of this work.
Reference articles HERE (MIT News) and from nature.com with more technical documentation in PDF. We can also delve further into the LED world from the article How to choose LED lighting.
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