> 2. Much "sharper" in it's shadows, so you go from blindingly bright to pitch black without your eyes having a chance to adapt, making it unsafer, and making the shadows "darker"
IMHO we can start worrying about this after we actually reduce light pollution. If we're at the point that astronomers can actually do useful work around large urban centres then let's start worrying about spectrum. As it stands they probably can't do much of anything now.
There is always garbage out there, regardless of product category. For streetlights you can get good products. Acuity's Autobahn Series ATB0:
> White Light: Correlated color temperature - 4000K, or optional 2700K, 3000K or 5000K, all 70 CRI
* https://img.acuitybrands.com/public-assets/catalog/122046/at...
* https://americanelectriclighting.acuitybrands.com/products/d...
* Via: https://www.darksky.org/our-work/lighting/lighting-for-indus...
> 2. Much "sharper" in it's shadows, so you go from blindingly bright to pitch black without your eyes having a chance to adapt, making it unsafer, and making the shadows "darker"
Lighting and crime (prevention) is debatable:
* https://www.darksky.org/light-pollution/lighting-crime-and-s...
Further, glare can blind people so as to not being able to see in darker areas:
* https://cescos.fau.edu/observatory/lightpol-security.html#Gl...
> 3. Much harder to filter out for astronomers
IMHO we can start worrying about this after we actually reduce light pollution. If we're at the point that astronomers can actually do useful work around large urban centres then let's start worrying about spectrum. As it stands they probably can't do much of anything now.