I believe that the highest lumens-per-Watt LEDs are higher color-temp, sadly, so I would think that the streetlights were optimized mainly for sheer output, and

I believe that the highest lumens-per-Watt LEDs are higher color-temp, sadly, so I would think that the streetlights were optimized mainly for sheer output, and the cold, daylight temp was just a side effect. I doubt there will be a lot of enthusiasm for pulling down new, long-lasting LEDs, but possibly colored lenses could be retrofit to them...