Thanks for replies.
The base of the stalk WAS covered, but it just randomly did that shit and it's weird..
Lost a couple of light bulbs and haven't had time to buy any, and I think I stressed it during light changes.
Went from 24/0, to 18/6 (did this twice to adjust the hours) and I've had 2 light bulbs break, meaning at two different times it lost steady light.
So no, I don't have lights at the bottom anymore and it's a pretty tall plant.. but plenty of sacks on it so it's probably male. Gonna keep an eye on it for the next few days.
Edit: the temperature was fine until I had to do a lot of readjusting and moving, that's when I noticed the curls... yes due to heat, so I probably stressed it in more than one way to cause it to herm/male. But I did notice trichomes on the budspots.. so maybe I can salvage them for hash?