Curling down since germination

Yes thank you for your reply guys, I’ve been growing for some time now and the only real thing that has changed is my lighting. Right now I have a Sp 1000 and a Vipar Spectro P1000 running at 75% @ 24 inches, in a 20x36x60 it might be overkill. As far as the watering and such, I’ve been doing exactly that! Thanks again I ll be experimenting with lighting.

lights are easy to eliminate as cause -- are the nodes too tightly stacked? can't quite tell from pictures. at this stage, maybe 1/4 - 1/2" or longer between the first couple is fine -- clearly not extra lanky, here. Using an sf1000? so 24" would probably want about 75% power on an 18/6 light cycle. if you are doing 100% fro 24, i'd dial back. Allow resulting internode development dictate further adjustments. (internode is the anatomical name for the stem portion between 2 growth nodes) ---- other shtuff... how are your irrigation habits? if you aren't promoting deeply growing roots, could be it is drying up top too fast - too large of proportion of roots are too dry? Make sure to saturate entire pot and then wait for enough loss of weight before re-irrigating. early on with soil wait for at least top 1" deep to dry. with coco, wait for top laer to dry (changes color). Since you are in a large pot with a small plant, you might do a smaller circle around the plant but not all the way to edges of pot. That's fine, but do make sure it gets wet all the way down to the bottom - a little runoff out bottom is fine even if in soil. you can dial in the volume if you consistently re-irrigate at same weight loss in future -- more so when you do the full pot, obviously. Consider 1 transplant with autoflowers. i've et to see transplant shock. The easier irrigation early on is worth it. What ppl say and what is a real drawback are two different things. It is easy to avoid shocking them. I've yet to see a transplant stop growing. even had a rootball disintegrate on my and had to gently repack roots while slowly filling in. Genuinely surprised by that one. But, shows you how robust they are. even ruderalis.. don't need kid gloves.. just need to feed it right. Anyway with good irrigation ahbits, it's alwas moister deeper rather than up top, so roots grow downward. they react to immediate environment and turn toward greater moisture. if you water superficially, this will be reversed and roots grow upward toward surface.. this is less than optimal. your vpd is a bit high for vege phase, but your growth has been okay. Unless oyu can raise your RH a bit, not much you can do. 78/40 isn't anything to worry about too much. Been similar temps and slightly more RH lately, myself, but no droop like this except for a couple oddballs out of 12. Environment can cause this, though. Variety among genetics does exist. i have 2 of 12 that are droopy. they are healthy and growing fine, so i'm not overly concerned at this point. Also, i will kill 2 more before flowering, so it's irrelevant if they are indeed junky or less robust in some way to how i grow plants. That's noot a trait i want to pass down, anyway.