Ok well i got the temps down a few days ago, had to heighten hps, so they are stretching now, and to be honest they have grown lots of nodes in a very small height lol, got temps to 82F through the day & 70F through the night, also i've added a big plastic container with lots of water in it placed it just after the fan so it can evaporate into the tent nicely and i've added a wet towel on the outside of the door way hanging half way down, got fan big fan outside and a small fan under the hps to blow the heat out the tent, good air circulation really, so by doing all this now, my humidity is just about 35%-40%, has been 20% all way through grow, you get me? thats been the problem but corrected now feel so stupid i really think i fucked the only time when they grow wk 1 through wk 3, onyx maybe a near miss as they are starting to get much much bigger...well to start with ur temps r alittle high. i run about 86-88 at canopy day, night about 70 ish this gives them time to re coupe. and i kept my rh at pot height at about 65-75% in veg and flower it should be between 40-60% mines usually 45% day, 55% night but i think im gonna start trying to keep it at 40% as the buds swell so i dont have mold issues. im not pos (im still new too) but i dont think u should be introducing (misting) any extra water during flower because mold. i pull about 10 gal a day from my room through a dehumidifier at about day 13 of flower and by harvest ill prob be pulling just at or over a gal per plant. (theoretically) im not super informed on the streaching part but my grow shop guy is awesome and he helped me build a system that allows me to have my lights very close to my canopy(12-16'' and my 3000w stay cold to the touch after 12 hrs) so i havent really noticed much streach just max. penitration through the canopys. r u rinning a sealed hood? do u have an in-line fan drawing air out?