Aluminium Phosphide (InGaAIP) led in part by Toshiba’s creation of LED Residential Light Fixtures that “reflected 90% or more of the generated light”. In addition, during this same period, it was discovered that different colors, including “white” (although a “true” white light was only recently produced through the use of an organic LED (OLED) by Cambridge Display Technology, in the U.K.) could be produced through “adjustments in the size of the energy band gap” when Indium Gallium Aluminium Phosphide (InGaAIP) was used, much in part because of the work of Shuji Nakamura of Nichia Corporation, who developed the world’s first blue LED in 1993. Today, this technology is used to produce LEDs that even emit “exotic colors” such as pink, purple and aqua as well as “genuine ultra-violet ‘black’ light.
A critical milestone was reached in 1997 when it became cost effective to produce “high brightness” LEDs in which the intensity (benefits) exceeded the associated costs to produce it. In conjunction with this milestone, newer technology is emerging that will likely reduce costs even further (and improve LED Flood Light For Replacement) – the introduction of quantum dots or microscopic crystals. This led to the concept of the first LED flashlight, in 1984. Then in parallel with emerging laser diode technology, which focused on maximizing light output, the first “ultra bright” LEDs were created in the early 1990s through the use of Indium Gallium.