advise needed

i have 8 plants unknow of there sex yet, all soil grown in a 2x2 space it has 4ft of hight for it to grow vertically and very good utes and ventaltion, im 4 days in to flowering and want to know if i can use the 2- 26 watt soft white cfls and 1- 250 watt mh for my flowering stage. by the way whats a guess on about how big of a yield ill get and potency from this set up

well you cant really guess just have to wait and find out..but i say oz per plant and Idk about potency

u could pull t off with adding more cfls but as for the mh it has the wrong spectrum invest in a hps for flowering