Does led technology really bring energy savings?

Street lamp tested in Sicom

Environmental impact, reducing consumption, increasing the length of life of the product are the main objectives of the awareness campaign is made in favor of LED bulbs. This new lighting technology has made appearance on the market about 20 years ago and is set to become, because of its important components "green", excellent tool to illuminate public and private environments.

A sensitive part of all electricity used in the world is used for the single task of lighting. In order to limit consumption and reduce operating expenses, the States are aiming for years on LED technology. Data in hand, This technology promises a lifespan of the bulb above the 30.000 hours or a replacement frequency 10 times lower than previous incandescent. This factor should be added that the new generation of bulbs for lighting, is sodium free, Mercury & fluorescent (harmful substances and unhealthy), There is no filament or typical gas earlier bulbs (fluorescent or incandescent) and using electronic components that are considered altogether less polluting.
LED lighting is certainly a product that presents a number of interesting effects on several fronts. But are we really sure that the technology developed for this business for 20 years years has reached the point of maturity? We have collected here a series of observations.

The actual efficiency of the LED bulb is the sum of the product components or: the quality of LED technology, thermal structure design goodness, the effectiveness of the current transformer and optical instrument used.

Unfortunately there are LED bulbs that reveal a poor light quality and whose effective duration is not reflected with the specifications on the package. Products of this type can be the result of poor research and dedication the producer or just uprights "old technologies". The result of this type of product is the emission of a light source is not properly adapted to Visual comfort and a low quality of components that deteriorate well before the "thousand hours operation" promises.

Some technological details

To understand why this difference between the promised results and those kept you have to go back a few years, When between 2010 and the 2011 prices of LED chip and plastic packets "produced exclusively for large LED screens, it suffered a sharp collapse for saturation of production. The low prices of components allowed to use redundant technology ( before too expensive) reimpiegandola in the field of lighting.

These LEDs "reused" were used in low and medium power lighting types typical of the home and the structure of the technology used has a plastic package PPA .

The PPA (acronym for polyphthalamide) is a thermoplastic resin capable of withstanding high temperatures and is allocated within the led bulb. The resin receives a significant amount of light reflected from surfaces

LED assembled in a plastic package

LED assembled in a plastic package

white light package cavity where the led chips (Figure). The action of constant lighting of the LED plastic package does discolor bulb white surfaces, While photons emitted by led blue chip lead to discoloration of the surface of the PPA package that starts to absorb light with consequent depreciation of lumen maintenance.

Lower the cost of goods using components that are not eligible ( in this case use technology that was meant for the product led TV) or low price is not always the solution to spread massively a product. The risk, as demonstrated, is to market an article running from being reliable and which disregards the performance promise.

Unlike the low and medium power LEDs mounted on plastic bags for PPA, high power LEDs that mount on ceramic base manage to have high performance and to maintain the initial luminous flux, color stability, guaranteeing energy saving and maintenance much underlined.

It is necessary then to optimize the technology used by navigating to the disposal of plastic bags for PPA LED to those mounted on ceramics trying though to contain costs resulting from the different components and making them accessible to the consumer.

A second interesting point about optimizing LED technology is the goodness of designing the structure in which it is placed.
The technology inside the bulb must be preserved from high temperatures produced during operation. So, to ensure proper functionality, product design looks important equal because the technology used.
LED lamps are hot to the touch function ( about half the heat produced by an incandescent bulb ). The bulb of the LED bulb is the part responsible for the loss of heat produced while the heat sink, Another important element, keeps the power supply and electronics as fresh as possible.

When the size of the electronics go hand in hand with product design you have a correct management of the air flow and a consequent great light yield, stability of electronic components, life and savings. This combination of elements, though not always manages to find the correct proportions.

Then there is at least one other case that LED technology has failed to "emerge" as promised: This is the case of halogen bulb. Used most often in the home and in shops, This type of lighting had the advantage of producing a bright light while occupying a space small, reached very high temperatures during normal operation and was able to dissipate much heat even with small light bulbs. The current LED products cannot "replace" this product for a problem related to temperature. As mentioned above in fact, typical electronic circuits of LED technology must remain at lower temperatures and consequently cannot dispel the same heat in a small volume. Just another aspect which confirms that there is still plenty of room for research and development of new products.

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