As light hits the water it absorbs stronger on the red end and weaker on the blue, which is why it appears blue. The ocean has colors pending on particles in the water and the more photo present the greener the color. It can be same for a swimming pool inside, deeper the water bluer it appears. Therefore, I believe the blue to be a crucial color spectrum but not necessarily to the extent of what we use to get the higher K color temps.
Kelvin rating and nanometers are not related. Nanometer is the wavelength of the light and Kelvin came from what color an iron pot turns at so many degrees Kelvin. .
This is how chlorophyll absorbs the different colors
Thanks all ! Im wondering because I wonder how long to have lights on total hours a day. I have mine on 9 total with just blues on for 2 of those hours. Any changes you'd make? My lights are dimmable and whites r on at 35% blues at 50%