OK, I go by a simple rule.
50 watts per sq. foot at least.
So if you have a 400 watt light.
Thats a 2 by 2 foot area to grow in.

So just use this formula for your floro's.

The temp should be fine.

Might be root bound causing your leaves to do that.

You got a ph meter, right?

OK transplanting a flowering plant.
In my opinion there is only one way to do this.
And it inclueds cutting the pots they are in now.
You cut the bottom off.
Trying not to cut the roots too much.
A little is fine.
And could actually help root faster.
So cut of the bottom and set on top of a new pot full of nice new soil.
The roots will stretch into any space provided to them.