LED Lights Reviews : for Home, Outdoor & more – Reviews of …

It all began over100 years ago, when electroluminescent phenomenon was first discovered in 1907 by a British experimenter, H.J. Round, using an electrified probe on a chunk of silicon carbide crystal, produced the first visible shafts of light, however Russian scientists credibly reported the first creation of LED in 1927.

After various experimental reports in the 50s, American experimenters Robert Brady and Gary Pittman, working at Texas Instruments in 1961 found that gallium arsenide emitted infrared radiation when electrical current was applied, although this light was not visible to the naked eye is allowed mass adoption of LED for infrared control devices.

General electric company employee; Nick Holonyak Jr in 1962 produced the first practical visible red LED and is considered by some as the grandfather of LED

in 1968 the Monsanto company first organized mass produced visible LEDs using gallium arsenide phosphate. Quickly propelled into mass adoption in handheld devices such as calculators, wristwatches, and digital displays of all types but until around 1995, were not considered bright enough for any replacement of traditional lighting.

The introduction of high brightness blue LEDs, demonstrated by the Nichia Corporation and eventually leading to the 2006 millennium technology prize for Shuji Nakamura, todays high-tech LED lighting is all based on this research. High output blue LEDs have revolutionized the computer industry with advancements in blue Ray technology.(The first blue LEDs using gallium nitride were made in 1971 by Jacques Pankove at RCA Laboratories)

Growing LEDs

Although silicon dioxide or Quartz is an abundant compound in the Earths crust, it must be converted into pure silicum or silicon, through advanced scientific precipitation process. Other processes (Zohnenschmelz or Czochralski process) are required and then it is pulled or grown into crystals up to 20 cm wide with a length of up to 2 m! These crystal extrudes are now called wafern and must go through a further crucial doping procedure in which the wafer in are bombarded with ions from foreign atoms in sophisticated accelerator chambers.

LED Lights technology has evolved from the early days of the first generation D.I.P. 5mil LED, with its inherent heat management problems to todays High-output MCCOB LED technology .

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