who is kalvin? and why can't he handle the high with grow lights?
The Kelvin (K) is just a reference to the color of the lamp in the luminaire. There isn't any reason the luminaire (light fixture) can't handle any reference to Kelvin color. As long as all the hardware and lamps match as specified (IE: matching lamps with appropriate ballast).
I have been under the impression that some of those grow lights are just inexpensive magnetic ballasts and reflectors.
IMHO, I would definitely go with a proven product for our hobby; since we are talking about a wet and salty environment!
IME, Those electronic ballast are much better than magnetic anyway.