A Quick History Of The LED PL Lamp
In 1907, H. J. Round, a researcher at Marconi laboratories, found out the electroluminescence phenomenon by using a crystal of carbon and silica and a traditional detector made from a semi-conductive metal. From that point to the modern LED PL lamp, there is a century of improvements and breakthroughs introduced by scientists all over the world.
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The Russian Oleg Vladimirovich Losev was the one that created the very first LED around 1920. Everybody was excited about his breakthrough discovery, but because the light gained by this process was too poor, no one seemed to obtain its utility. It was only in 1961 that Bob Biar and Gary Pittman learned that, by applying an electrical current to a gallium arsenide, they could acquire an infra-red light.
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In the next year, Nick Holonyak made the very first red LED PL Lamp, while he was working at an electricity company. The color and the strength of the light depended on the composition of the semi-conductor metal. The next step was to make the first yellow LED PL Lamp, and ever since that day until now, when there are so many kinds of colored LEDs, almost every year meant a step onwards.
Initially, LEDs were too costly to be used on a large scale, but in 1968, the Monsanto Corporation was the first company that started to mass produce LEDs. Afterwards, Monsanto was bought by a computer company and the LEDs were integrated in the alphanumeric computers. For a while, they were used just as indicators in the high-priced equipment, in order to replace the incandescent lamps.
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From those computer displays, that were able to show a single letter, to the animated displays of our days, and, in addition to walls of LED lamps displays, which can re-create intricate images and movements, graduate colors as well as shades, the step was a big one, made in a short period of time - around 30-40 years of research and evolution.
The first LED PL Lamp that could be utilized to produce light was made by Shuji Nakamura in 1993 with an In-Ga-N alloy. In 2006 Nakamura was granted the Millenium Technology Prize for his achievement. Nakamura's LED had the color blue and, when combined with the yellow one designed by Dr. M. George Craford in 1971, a white light could be made, similar to the light given by the incandescent bulbs.
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In 2008, the strongest LED to that day was made by a South-Korean manufacturer. The company was able to generate a record 900 lumen at 10 watts, 90 lumens / watt - almost the same as a 75 watt light bulb. Two years later on, a Japanese firm created a prototype of another powerful LED reaching 120 lumen / watt and, soon after, another company proclaimed that they made a prototype that can obtain 208 lm / watt.
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This quick evolution of almost 100 years permits us to suppose that, in a short period of time, we will all live in houses and work in offices that will utilize the LED PL lamp as main light emitter.
Main Pros And Cons Of Utilizing LED PL Lamps
In 1907, as H. J. Round discovered electroluminescence - the concept that acceptable the very first LED PL bulbs to be created - neither anyone managed to discover a usage for this discovery.
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