Change the CFLs to LEDs

Are CFLs Dangerous?

Are CFLs dangerous? The controversy continues as disappear from shelves this Wednesday, June 30, 60 W incandescent bulbs. And you, do you have the lamps low consumption?

Are CFLs Dangerous

There have been brighter birthday. June 30, 2009, 100-watt incandescent bulbs and more disappeared rays for the benefit of the CFLs. 60 watts and more follow the same path this June 30, 2010. A year energy efficient, but rich in controversy, because the new CFLs said would be dangerous for health, because of the waves they emit some. The Criirem (Centre of research and independent information on non ionizing electromagnetic radiation) advises not approaching less than 1 meter: deca, estimated the association, the radio frequencies emitted are too powerful.

Judging these exaggerated precautions, Ademe (environment and energy control agency) launched last year a campaign of measures on a hundred models of the market, whose results are finally to be made public. “The study shows that these lamps are comply with standards for electromagnetic fields to 30 centimetres, summarizes Bruno Lafitte, responsible of the public body. Simply follow this distance.” Not that simple, says Pierre Le Ruz, president of the Criirem: “certain values are higher than those we had published; they are flirting with the European standard, we find already too high! There are also worrying interference problems for medical devices for cardiac pacemaker type, because the threshold of 10 volts per meter is often exceeded.”

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Aware of the problem, manufacturers work on fortifications. “A statement of the type”low radiation”could even become a selling point,” argues Frédéric Granotier, president of the Distributor Lucibel. The debate has at least the advantage to highlight the attractions of the lamps with diodes (or CFL abbreviated by AbbreviationFinder), still more economical to use than the CFLs and which do not emit any such waves.

And you, a year after, what do you think of the lamps low consumption? The have you adopted or expect the leds?

LED Lamps: Know before You Buy

 

LED (light-emitting diode) lamps are not new, but their use in the living quarters, energy savings require, is only just starting. For the writing of this article we interviewed Weena Lemoine, product manager public lighting at Philips, global leader in lighting.

LED (light emitting device in English) or DEL in french means Diode Electro Luminescente. It is a compound semiconductor that emits light when an electric current passes. Its domestic use date from the 1970s. The LED was initially used for signage as light in the appliances for example (remote control, alarm clock). Over the last 10 years, considerable progress has been made in technology, offering the possibility to use as the source of light in the outdoor illuminations.

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Substantial savings 

On the basis of a light bulb of 50W paid 1 euros and running 1000 hours a year, electricity consumption generates a cost in the range of 5 euros; 0.5 euro with an LED lamp which costs 30 euros.

On the basis of a rather conservative assumption of a life time of the classic bulb 2 years and 15 years for the LED bulb. The total cost is 82.5 euros for the incandescent and 37.5 euros only for the LED lamp.

The electric economy over the period is 675 kWh or a third of a tonne of CO2 and less on the basis the European mix of electricity production.
Yet, in the 1990s, LEDs were available in red or green. When the first blue LED was developed, it became possible to create white light by mixing red, green and blue or even a blue LED which the semiconductor material been doped with phosphorus atoms. Today, it is LED lamps combining the light radiation of one or several diodes with a perspective that allows to broadcast a more homogeneous luminous flux. Thus the LED enters our homes.

Robust and highly energy efficient LEDs are probably the future of home lighting and represent an excellent environmental choice by their ability to reduce energy consumption and thus CO2 emissions. Their small size allows to revolutionize the luminaire industry and more generally the interior lighting design.

However, they are still expensive to buy and their installation in existing luminaires should exercise precautions due to the heat emitted by the units of the lamps. We invite architects to ask manufacturers on this point in the design of interior lighting. A recent (in English) of LEDs Magazine, invites designers to lighting to read between the lines of the technical specifications of manufacturers and to take into account conditions of facilities.

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Pros and cons summaries of LED lamps

Life expectancy 15 to 25 times larger than an incandescent lamp and 3 to 4 times larger than a lamp CFL times. Energy saving up to 90% compared to an equivalent incandescent lamp.

LED lamps for the moment remains however limited in power. In the new range of Philips for domestic use LED lamps the more powerful lamps (5W) equivalent to a light bulb of 50 w. Attention however LED lighting can be less diffuse, and the comparison to the incandesecnce can be misleading. Especially necessary lighting can be less important if the surface to lit is very limited and very directive (spot) light.
On the label now learn how to evaluate the power of a lamp by the value of the luminous flux in lumen (lm abbreviation).
The lighting of the LED is instantaneous, as the recent CFL and incandescent lamps. LED lamps have an insensitivity to the repeated ignitions, which is not the case of the CFLs which the lifetime is affected by the number of ignitions.
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Change the CFLs to LEDS

Yet there are few professionals who have experience of domestic LED lighting. Regarding the adequacy of such LED bulb in such light, don’t rely on savvy professionals whose proven field experience. If in doubt check the temperature of the bulb support rise.

Generated, no electromagnetic or UV radiation field unlike lamps CFL (in low proportions however). No mercury in the lamps to LEDs, but she must do the chart of a careful recycling. Sellers have an obligation to take back them.

LED lamps do not infrared radiate toward the front of the lamp, but against the back of the lamp must be ventilated properly to evacuate a significant heat. So, we’ll be careful to install LED bulbs in fixtures or spot holders who are well vented. Manufacturers usually indicate the recommended lamp destination (chandeliers, bedside lamps, spots, etc.)

The manufacturers offer color temperatures which can vary from the equivalence with the light bulbs in the light of the day. Lamps of various colors (red, blue, green) are also available.

LED lamps are made to operate at a temperature of 25 ° C. When the average operating temperature increases life expectancy decreases. Hence, once again, good ventilation.

By nature the LED lamp is not compatible with dimmers unless otherwise indicated on the box. From 2010 all Philips lamps will be compatible with dimmers.

Use with the minuturies is deprecated (reduction of life expectancy).

The price of LED lamps are still high (from 8 to 30 euros in the Philips range).

Focus

COLOR RENDERING INDEX

(IRC) colour rendering index represents the quality of light; namely its ability to faithfully make the true nature of the colors as you can see under the natural light of the Sun. This index is close to 100, the quality of light is excellent. For example IRC of the Performance of Philips LED lamps is between 85 and 90.

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COLOUR STABILITY

According to Philips, some products as they age can change color. Example, a white LED light may pull on the green at the end of life. Thanks to a careful selection of high-power diodes used in the manufacture of its LED lights, Philips ensures that the color of the light of the LED lamps does not change throughout their period of use.

LIFE

A diode can last between 50,000 h and 100,000 h compared to 1,000 hours (i.e., 1 year) for an ordinary incandescent bulb. However, the LED lamp can reach a life expectancy as high as the diode it contains because electrical components that make up the lamp, they also do not last 50,000 or 100,000 hours. In general the lifetimes announced are of the order of 15 000 to 25 000 hours. Builders are all subject to the same calculation protocol to establish life. It is a statistical measure; It is defined as the duration beyond which more than 50% of a large enough sample lamps are grilled. What wants to say that life on the box is not a guarantee, but an indication. However, when you buy an LED lamp, keep the receipt. your lamp is guaranteed against any manufacturing defect and if his life was really too short, successful salespeople consumer services should react favorably.

EVOLUTION OF THE PERFORMANCE OVER TIME

According to Philips, some LED products are effective the first time but quickly level down to produce end of life that 20% of the amount of initial light. Philips ensures that its Luxeon Rebel LEDs, which are also used in the workplace (illuminations), are the best in the market. According to the manufacturer, the quantity of light produced at end of life is still at least 70% (compared to the amount of initial light). A data that will be difficult to check because it would take a light meter (device for measuring the illuminance), and secondly because on an operational lifetime of 25,000 hours, either in the order of 20 to 25 years of regular use on the one hand, the decay is low (it seems that it is linear). The evolution of the performance at the time will also be affected by the operating temperature of the lamp.

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