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Straight MH's work great and I think are more important when flowering sat doms and sats. You get tighter nodes and better bud structure. Yield is a bit less but there is an enhancement of the fragrances/flavors. One year I had to go with MH's in my 2 1000 watters and quality overall was over the top. That was with cool halides and warms would have been better. From what I learned over the last few years, and my experience, I'm going with warm halides for flowering next time I get set up.