Auto flowering plants dont care lol. They flower when they want and they do not go back to veg.
The three types of cannabis seeds you can get are, auto, feminized and regular.
Autos are bread with another kind of cannabis called a ruderalis. Ruderalis is an auto flowering strain of cannabis. This means that no matter what your light schedule is, the plant is going to flower when it's time. I'm not familiar enough with autos to know their average veg time, but I'm sure others can tell you.
So even if you keep your light on 24 7, the auto flower will flower when it wants to flower. Average flower growth is usually 100%. So unless autos are different, they should double in size during flower.
But also I've heard that autos don't like being transplanted, I dont know enough about autos to say if you would be better off o e way or the other, hopefully someone experienced with autos can help here.
But even if they stay small, you will get something out of them. And now you know for next time.
I personally stick to feminized seeds. These are regular photoperiod seeds but are only female, no males. Because they are photoperiod, you can control the veg and flower cycle by light timing. This means you can veg as long as you want, keep a mother plant, take clones and not having to deal with hermaphrodites as often. Other people swear by autos, have them down to a science and get great results. But I detest the entire idea. Not being able to clone or keep a mom pretty much forces you to start from seed every time. That's the biggest deal to me.
But I've rambled on enough, hope someone with more auto experience can help
30 is too hot
they can handle it, but it stresses them unless they are in a high co2 environment, then 30 would be ok.
Rh isn't that big a deal, but 35 would be traditionally low. I find rh isn't that big a deal unless your are at extremes like 20% or lower and 80% and higher.
Light distance on led should be recommended by the manufacturer.
If you dont mind, let me know the light you are using, and what kind of ventilation you have. Also what's your room temperature outside the tent?