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ive noticed a lot of growth in these girls when the lights are out. they love it! I run 20/4 right now can I switch to 18/6 and if I do could this potentially hurt my ladys or benefit more from it?
No problem whatsoever. I run 18/6 on all my plants (autos throughout, photoperiods during veg). I've tried 20/4 with autos but haven't noticed a difference personally. I say go for it!
Good luck!