Last week, LED celebrated its 50th birthday, here's a look at how the technology has evolved since then.
While LED is experiencing a popular surge, this efficient technology has really been 50 years in the making.
Wired has a great slideshow on the history of light emitting diodes, or LEDs, "from the first dim red diodes to powerful streetlights in major cities, the LED has made its mark on the world."
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