MIGrampaUSA
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For survival you may have to go HPS ever so often!
I've grown under HPS and had good results. However, these plants under my quantum boards and some 4ft t-8's are growing very compact. Very stout stems. There's some real differences in how plants seem to grow under LEDs that I don't think are "ALL" genetically related. Stem growth is one thing that has jumped out at me.
I originally was going to buy 4 boards but talked myself back to 2 ....