Q) What do the letters, L-E-D, stand for?
A) Light Emitting Diode.
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Q) What is an LED?
A) An LED is a solid state light emitting device.
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Q) What are the advantages of LEDs?
A) LED's are energy efficient and have a very long life typically 100,000 hours or more.
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Q) What colors do LEDs come in?
A) All colours including white light. The white light versions are already available in nume3rous colour temperatures including Warm White light.
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Q) What is the color temperature of white LED's?
A) White LED's can and do vary in color temperature. Some white LEDs can be as "warm" as 3000K colour temperature. A light bulb typically has a colour temp of 2700K.
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Q) How bright is a 1W MI LED?
A) A single 1 watt MI LED can produce in excess of 80 lumens per watt.
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Q) How does the brightness of LED's compare with incandescent light sources?
A) Since a standard 60W incandescent light bulb can produce up to 900 lumens a single 1 watt MI LED produces aprox 1/10th of the lumens.
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Q) How can LEDs be used successfully in lighting fixtures?
A) For most LED lighting fixtures to provide adequate lighting the fixture must contain groups of LED's.
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Q) Are LEDs efficient?
A) Yes, LED's now produce up to 80 Lumens per watt whereas incandescent light sources produce only about 15 lumens/watt.
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Q) Are LEDs more efficient than fluorescent light sources?
A) Not yet. A compact fluorescent light source (CFL) produces about 50 lumens/watt. So, LEDs presently have an efficacy (efficiency rating) that is somewhere between incandescent and fluorescent light sources. Having made this statement of course LED's are more Eco frindly as no mercury is used in their manufacture and signficantly less energy is used at the manufacturing source to make them.
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Q) Will LED's become even brighter in the future?
A) Almost certainly. The lumen output of LEDs has almost doubled in the last two years.
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Q) Do LEDs get warm?
A) Yes, all light sources generate heat including LED's. However,LED's do not get very hot, especially if the LEDs are well designed into the light fixture and with "heat sinks" to help dissipate the heat generated
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Q) Do LED's emit infrared radiation (heat radiation) like incandescent light sources?
A) No, they do not.
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Q) Do LEDs emit ultraviolet radiation (UV rays)?
A) No, they do not.
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Q) What is the expected life of an LED?
A) The typical LED has a lifetime of 100,000 hours.
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Q) Do all LEDs have a lifetime of 100,000 hours?
A) Only in the laboratory; under real operating conditions LED life can vary according to operating conditions.
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