Yes, when you are prepping your moms to take cuts, you can swap in the more intense T8 bulbs.
You will learn to find the balance that allows you to schedule when your mothers are ready to take cuttings by manipulating their light intensity, food, and even temperature.

Oh. Moms love superthrive applied at one drop per gallon in a bloom fertilizer about a week before taking cuts. The b12 in the ST is useful for preventing stress, and the phosphorous in the bloom fert is important in growing new roots. You should not feed Nitrogen to a plant that you are about to cut from- there is N in superthrive but at the recommended dosage it is not too much.
After you take cuts, you can flush out the plants and feed them with a 1/2 strenght GROW fert to give them a little boost for the new growth.