First Grow ever. (Outdoors)

You'll get stretch with cfls unless there within a couple inches of the plant. Useful light range with t5 is a little better but they can still be pulled in pretty close unless it's a pretty hot 12 bulb setup.

I have no clue what hardening is but for a plant of that size i would not exceed an nutrient level of around 0.8 so anywhere below that and you should be okay :) I would advise transplanting these into there forever pots as soon as you can quick you get that stress out the way the better. the more time the plant has to really fill its media :)