4 Assed Sour Bear

Day 15 - I'm still a little concerned about the humidity so I put a small plastic container with water and a towel inside it in the middle of the tent. Up to 41% this morning . 3 Bears OG still not looking great at the lower leaves but new growth looks fine so far. I'm guessing either under-watering while it was a seedling, or general pH issues. Never grown autos before, does their size look healthy for 2 weeks in? Day 18 - All plants are showing pistils. First real feeding today, hoping to get some last minute growth in. Day 19 - Switched lighting to 24-0 (from 19-5). In hindsight I would have liked to have been on 24-0 much earlier, perhaps even the entire grow, but I've read about root growth happening more in dark periods. Not sure how true that is and if it would be true for autos as well as photos. Probably missed out on some valuable veg time.