Thread: Color changing LEDs
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Andrew Rossmann Andrew Rossmann is offline
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Default Color changing LEDs
In article ,
says...

I keep seeing these little solar power sidewalk lights. Last year
they were all white (blueish white). Lately I see them where they
change color. Yet, they only have one LED. How can a LED change
color? I thought the color was determined by dopeing it with a metal.
So how can they change? This has me puzzled.

It could be the plastic windows on those cheap things turning yellow?

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