Like the guys says you are gonna need more light,lights are not that exspensive and a h.p.s/h.i.d will pay you back after the first grow.I would only use the kind of lighting that you are useing to start plants from seed or clones.I have 2 flouresents in the clone room along with 2 cfl's these give me the heat i need for the plants.The flouresents are cool tubes because i want them has close to the plants has possible.The last thing any grower needs is leggy plants you want the lights has close has you can get them without burning them.If you are gonna continue to use these lights then you may be takeing a risk that is not worth it.