Why The Invention Of The Blue LED Was Revolutionary


Image Credit: Reuters


A quick overview:

  • The blue light-emitting diode (LED) was invented in Japan in the early 1990s by Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura.
  • Previously, red and green LEDs existed, but adding blue to the mix would allow white LEDs (Red, Blue, Green = White).
  • LEDs produce the most amount of light per watt; LEDs: 83 lumens per watt, CFL bulb: 67 lumens per watt, incandescent: 16 lumens per watt.
  • LEDs generate light via a semiconductor. Incandescent bulbs use a wire filament. LEDs produce less heat, making them more efficient.
  • LEDs last 30 times longer than traditional bulbs.
  • LED prices are dropping and are expected to now have the largest revenue share compared to other forms of lighting. 
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Also see: Nobel prize press release