Comment on Why It Was Almost Impossible to Make the Blue LED

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nicerdicer@feddit.de ⁨4⁩ ⁨months⁩ ago

Before there were blue LED, the indicator light for full beam was a blue tinted incandescent bulb. My parents had a Volkswagen Passat from the 1980s (?) where the usually blue indicator light for full beam was a green LED, since blue ones were not invented back then.

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