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osigurdson
6 months ago
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US Streetlights Are Turning Purple
TL;DR - coating is wearing off.
downboots
6 months ago
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The fix is incredibly simple
https://www.youtube.com//watch?v=4Mll-YDDAF4&t=678
ramses0
6 months ago
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This should be top comment!
xxs
6 months ago
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root
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I don't know the: "fix" is anything but cheap or easily applicable
xxs
6 months ago
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Sure, white LEDs are blue LEDs with a phosphorus layer. The Blue LED invention led to the 2014 Nobel Prize for Physics.
waltbosz
6 months ago
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parent
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I (and my 6-year-old) really enjoyed this video from Veritasium about the invention of the blue LED.
https://www.youtube.com/watch?v=AF8d72mA41M
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