The History of LED Lighting: Then and Now | #lâmpa..

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The History of LED Lighting: Then and Now | #lâmpada led acesa com interruptor desligado 220v

The History of LED Lighting: Then and Now

The History of LED Lighting: Then and Now

In 1972, electrical engineer, M George Craford invented the primary yellow-colored LED for Monsanto using gallium arsenide phosphide in the diode.

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