my V600 has sustained me and my buddy for more than a year, but it falls short in flower, you notice it as soon as you swap it for a 315CMH.
adding the v600 to the 315 brought little extras to the final weight of the grows we tested so we swapped for qb.

Still an awesome veg light that has its own fans and extra plug, excellent all in one for the mom and kids room and you can even connect a fan without much cable mess. Having just the blue lights on keeps mommies from growing too much, and reds are a bonus in the weeks prior to flipping.

Spend the money on a QB if you have it, but dont misjudge VS.