LEDs MORE INFORMATIONS1. What is a LED ? LED, is the short word for Light-Emitting Diode, which is an electronic component able to emit light when an electric current passed through. This component is part of the optoelectronic component family. Currently, the LEDs used by CANDeLeC are able to offer almost 100 lumens per watt which puts them ahead of all the existing light sources. 2. Does the LED bulbs light enough? The technology made tremendous progress and now the LED is indisputably the cheapest light source on the market. The choice of your bulbs is very important as it must be done according to their destinations. In almost all cases, a CANDeLeC High Power LED bulb will be a bright enough source of lighting. Is it really necessary to have a 60W incandescent bulb to light 2m² toilets, to illuminate a one meter wide hallway, to illuminate an entrance or to create a markup at night, when a CANDeLeC LED bulb of 3, 4 or 6 W will give you enough light for a 10 times longer lifetime?... In larger rooms, simply increase the number of lighting points. It offers a lot of advantages... There is no need to put a 100watts bulb in the middle of a room. Using as a replacement for equivalent light, two 6W CANDeLeC LED bulbs allows you to use only one bulb in the evening, to have a more cozy atmosphere, or both when more light is needed. Color bulbs are also a possible decoration choice... LED lighting offers the perfect modularity at a lower cost. 3. Why announce such a long lifetime? An electronic component is announced for an average lifespan of 100,000 hours. LED are existing for over 40 years and are operating in numerous applications (TV, HiFi, home appliances, etc..) with record lifetimes. The heat emitted by the CANDeLeC LED bulbs is very low. The CANDeLeC bulbs have specific cooling fins made of technical materials designed to allowing an extremely efficient ventilation. Even after several hours switched on they are barely warm when touched. It's the heat emitted by incandescent and halogen bulbs (93% of the energy converted into heat for only 7% in light), which is causing there poor results of lifespan. The instant ignition is the best feature of the LED. It delivers 100% of light immediately when compact fluorescent bulbs canrequire sometimes more than 15 seconds of preheating. 4. Is there a comparison chart between LED, incandescent, halogen and even compact fluorescent lighting? The answer is not easy and here is the reason why: A bulb containing for example 4 LEDs can produce a luminous flux from a few tens of lumens to about 350 lumens depending on the used LEDs. This depends on the quality of LED used in the lamp (3mm, 5mm, 8mm, 10mm, straw hat LED, Helmet LED, superflux, high power, Cree, Nichia, Sharp, Edison, Bridgelux, Epistar, Everlight, SMD, etc....), on the power of the LED (from a few micro-candelas up to about 160 lumens), on the beam angle (5° to 150° or 360° for the latest), on the color of illumination (red illuminates very little while green is very powerful, warm white will be less powerful than a bright cool white), on the power given to the supply (sub-feeding a LED increases its lifetime while reducing its lighting power, overfeeding a LED gives more lighting power to the detriment of a shorter lifetime) etc.. 5. What difference is there between an angle of 20° and an angle of 40°? The angle of 40° is more important. It provides a light scattering over a much wider beam so light is well disseminated. A narrow angle of 20° concentrated the beam of light and increase the range compared to the 40° angle. Usually, a LED having an angle of 20° gain in beam range/length what it loses in breadth and conversely, a LED having an angle of 40° wins in beam angle/width what it loses in length. So, if you want to highlight a specific object, placed on a shelf or at a significant distance you should opt for a small angle of 20° so that the light reaches a particular area. If instead you want a well distributed light over a lower distance opt for a more importante beam to avoid having this concentration of light spread over a specific point. For a traditional lighting from the ceiling (recessed spot for example) CANDeLeC can bring you all possible solutions, from the most narrow angle (15°) to the largest diffusion (360°). 6. How to choose a white color among others? The white of a light is expressed as color temperature in Kelvins or Kelvin degrees (°K). The color emitted by a LED is obtained by the wavelength that passes through, in general this yields a very accurate color in all the pure colors (red, green, blue, etc ...) but the white, which is as you know not a color, can only be obtained by mixing up several wavelengths. The first generation of white LEDs were obtained from the blue color to which was added some hiding chemicals to get an approximativ white. It was a quite cold color containing a hint of blue in the scattered light, which disappointed a lot of people who feld in a laboratory atmosphere. Nowadays the CANDeLeC bulbs are produced in 4 white level going from the the coolest to the warmest white (Cool White, Day Light, Warm White and Warm White Yellow). The white color is given with values include between 2600°K and 7500°K. The lower the number is the warmer the color is and the higher the number is, the colder the color will be, however, some values have to remembered: • A halogen or incandescent lighting is within a range of 2300°K to 3200°K. • A neutral white is in a value of 4500-5000°K. It has the specificity of featuring the colors very well. • A lighting is considered as cold when its value reaches or exceeds 6500°K. The higher is the value the more it will be considered as cold. The advantage of this kind of cool white is that it is more powerfull. It is mainly used for outdoor or specific applications. 7. Can you use a dimmer with LED bulbs? Yes, but it will be necessary to choose the option "dimmable" mentionned in the technical sheets of our products. 8. Do I do something for the planet by buying an LED bulb? Of course! Buying a LED bulb is a fantastic thing for the planet, as well as taking a shower instead of a bath or take the bicycle instead of the car. Humanity produces nearly two-thirds of its electricity by burning carbon (oil, natural gas and coal) with significant carbon dioxide emission. The experts worldwide estimate to 15~20% the proportion of lighting in the annual electricity consumption of a household... 9. Is a LED bulb expensive? No! The investment may seem expensive compared to an incandescent bulb whose lifetime is 1000 or 2000 hours but the return on investment is actually very fast (+/- 12 months) ...
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