Iowa DOT has an interesting explanation for the "blue" street lights🤔🤔🧐🧐
(media.greatawakening.win)
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Blue LEDs are painted with white phosphorus to give the warmer light temperatures. Standard warranty of LED is 5 years but that is not going to cover labor to change them out.
The led's are actually BLUE and the phosphorus is yellow (blue passing through yellow results in white) the phosphorus is burning away...resulting in some phosphorus being left which emits a purple color light output and eventually will be blue light once the phos is all burned off.
Why only at intersections? In my closest city I drive through everyday the blue purple lights are in all the corners of major intersections. All other lights leading up the intersection are normal…weird