What happened in the 1960s?
💡 LED (Light Emitting Diode) invented (1962)
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Further Reading
Light-emitting diode - Wikipedia (wikipedia.org)
Oct. 9, 1962: First Visible LED Is Demonstrated - WIRED (wired.com)
A blaze of innovation: The illuminating history of light - LEDiL (ledil.com)
When was the LED bulb invented? - Quora (quora.com)
50 years ago: How Holonyak won the race to invent visible LEDs (springer.com)
History of LED Lighting | Light-Emitting Diode (LED) Sabba (sabba.com)
LED (Light-emitting diode) - Invented by Nick Holonyak - Edubilla.com (edubilla.com)
History of LED Lighting - Shine Retrofits (shineretrofits.com)
Who invented LED bulbs? - Quora (quora.com)