TIL since 2020, white LED streetlights have been turning purple because of a defect during the manufacturing process between 2017 and 2019. The yellow phosphor coating was delaminating, and the blue LED
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/cloudfront-us-east-1.images.arcpublishing.com/gray/SXKVWW235VC4JMLUKIFSPLJWR4.jpg "Why are some street lights across Greater Cincinnati turning purple?")
Why are some street lights across Greater Cincinnati turning purple?
