i dont know for sure but i can tell u that i to have six bulbs and i changed them to 5 2700k and 1 6500k for my 39 day old pounder and shes fillen out good
I would wait for vertical growth to stop... the reason is, your in pre flower not flower, and at that time switch your nutrient's over to a flower mix......
Running a light blend now depends on your stretch-if your trying to keep it short run all 65k till the stretch slows. But I'm not a long time auto guy but that's IMO. If your too stout pump up the red.
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