advise needed please help

this is my first grow and ive been growing for 4 weeks indoors from seedling start inside of a fish tank, there are 8 plants and i use two 65 watt plant lights ans one 70 watt plant forecent light, can i use this for all stages? i just started the flowering stage 2 days ago when there were 8 inches because i dont have to much vertical space, i know i have enough space for them to grow till harvest, i use the right nutes i know from reading so much , right now there 8inches tall, i could use any advise i can get plz help thanks

4 - 23watt(6500K) Daylight CFL's AND 2 - 23watt(2700K) Soft White CFL's = vegging lights
18 hours on/6 hours off = veg light schedule
4 - 23watt(2700K) Soft White CFL's AND 2 - 23watt(6500K) Daylight CFL's = flowering lights
12 hours on/12 hours off = flower light schedule

nutes shouldnt be added until at least a month after they sprout out of the soil if it is a soil grow

it is soil grow, do u think i can use the lights i got now for my flowering stage and about how much tree u think ill get