ok I'm updating my experience here. I had 2- 2x4 tents with T5 8 bulb fixtures. Had a really nice mix of Red sun, 6500k, Floragrow(I think that's the name, but got at PetCo and a nice general red blend, Actinic blue, and 10k bulbs. and one of the german Purples. Looking at the cast of light...