Hi, good luck with the grow, I'm particularly interested in this one because I'm trying out a cupboard grow with a single Viparspectra 450, not expecting any real fireworks with just that one light, but it will be interesting to check out a grow using 2 Vipars at 600w. Like a poster above I couldn't keep the cupboard cool enough to grow easily. With the LED Temps are sitting in the high 70s. 2 600w should be just about right ( depending on the size of your grow space of course), will be interesting--