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Blue LED Streetlights Keeping You Awake?

If you’ve played around with “white” LEDs, you already know that there’s no such thing. There’s warm white and cool white and any numbers of whites in-between. And when white LEDs were new, the bluer “cool white” variety were significantly more prevalent. Enough US states have swapped out their old street lights with LEDs that it may be having a measurable effect on people and on the animals around us.
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