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The Chronicle
28d
Chronquiry: Why are West Campus street lights purple?
a phosphor-silicone layer adheres to LED chips, changing the color from blue to white. In defective bulbs, this layer forms cracks over time, turning the color back to blue or purple. Like most ...
10mon
on MSN
Why are there purple streetlights on Kansas City area highways? We found answers
The explanation likely lies in a process called delamination. Many LED light bulbs used for street lights actually give off a ...
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