One of the most important inventions in human history was artificial lighting.

With the electric light bulb the night could be illuminated,

allowing people to extend the productive hours in a day and to work in places that were otherwise difficult or impossible.

While the incandescent bulb was a breakthrough, it wasn't actually very efficient.

It wouldn't be until decades later that a radically more efficient way of producing artificial light would be developed.

Learn more about LEDs or light emitting diodes and how they work on this episode of

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Before I get into LEDs and how they work, I should first take a step back to address the history of artificial lighting and why there was a need for

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