LED lights are quite a recent innovation. Initially, they were initially employed in a very restricted fashion as indicator lights on electronic devices such as the on-off indicator on TVs and stereos. Nick Holonyak Jr achieved a major breakthrough in 1962. He developed the so-called red LED, the first practical LED. This achievement allowed LEDs to be used for indoor residential and commercial lighting, significantly broadening their usage potential. In that way, their successful commercialization became possible. Technically, Holonyak developed a method to blend GaAsP crystals (gallium arsenide phosphide).
Holonyak was trained as an electrical engineer. His work focused on both LED and semiconductor laser technologies. He earned a Ph. D. During 1954. After performing research at both Bells Laboratories and the General Electric Company, he returned to perform research at his alma mater, University of Illinois, during 1963.
Conventional incandescent lighting has dominated our lighting needs since the latter part of the nineteenth century when Thomas Edison (1847-1931) successfully commercialized the technology by lighting the premises of 59 customers during 1882 in and around Pearl Street in downtown Manhattan, New York. This reliable technology is now challenged by LEDs. In addition to mainstream indoor lighting in residential and commercial structures, LEDs are used in tough environments such as external settings on ships and airplanes.
LEDs provide many benefits versus incandescent lights. The major advantages for most users include greater efficiency (on a lumens per watt basis), extended life and smaller size dimensions. These advantages together represent significant dollar value for customers. Other benefits include focus, cycling, on-off time, color, dimming, cool light, shock resistance and slow (easily apparent) failure.
Low energy usage is the biggest advantage. LEDs deliver more light (lumens) per unit of power (watt). Each watt of power allows LEDs to deliver around 70 lumens of light . Depending on their lighting capacity, LEDs consume a miniscule amount of power (0.5 to 5 watts). Also, LEDs need much less energy in their initial manufacture. Both these savings mean they have a tiny carbon footprint.
The effective working life of an LED can range from 40,000 hours (4.6 calendar years) up to a massive 100,000 hours (11.4 calendar years) of continuous light. By comparison, an incandescent globe has a life of only a few thousand hours. Also, the illumination degradation of LEDs is also quite modest.
In conclusion, even though LED lights come at a higher initial capital cost, their longer life and lower energy consumption make them an effective investment cheaper option in the long run. They provide comfortable and soothing lighting. They are available in a wide range of sizes, colors, styles and designs. And are increasingly penetrating the lighting market, eroding market share from both incandescent and fluorescent lights.
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