Since I am transporting my plants from outdoors to indoors, and they have already started flowering, how much light should they get(Grow-lux fixture w/ 2 56 watt fluorescents)??? 12/12 or 18/6??

Also, what's a good kind of fertilizer that I can buy from home depot or lowe's (again, should I even bother using fertilizer even after bring them inside from outside, and they've already started flowering??)

Thanks again, James