Yeah Marc, Originally I though about plumbing it all together but the thought scared the #$&* outta me. Plus I think I will be redlining most of my equipment as it is so the 150's gotta go. That's the only downside to this project as I really enjoyed having it in my office. Maybe a nano or something down the road.
Padrino, I am planning to use my existing lights (3 x 250W XM 20K's with 2 x 6' super actinic VHOs. I will probably be adding a 2nd set of VHOs, maybe 75% actinics and eventually will be changing reflectors to the lumen max elites.