Started with evolution 150s and didn't like the color and growth I was having. I added 2 3' fixtures from Build my led that added yellow, green, red, and more white.
I eventually traded my 6' vhos for 2 3' super actinic fixtures from BML and had an immediate difference in growth and color.
Eventually I'd like to go all Build my Led or try one of the ATI t-5/led combos that some of the Zeovit guys are using.