Why It Was Almost Impossible to Make the Blue LED

[SammysHP]

Gets posted on Reddit r/flashlight every few hours since it was published. We had it here at BLF as well, for example:

Interesting history of Nichia, Nakamura Shūji, Cree, and LEDs

[Why It Was Almost Impossible to Make the Blue LED] Nakamura san is one cool dude.