good advice!
cfl arent ideal, but can be use succesfully to flower off. In holland, there are comercial grow set ups that run only flourecent tubes and cfl's, the secret is the size of plants, small being the ansew to that! as cfl dont have hardly any canopy penetration!. So if you grow single colas in SOG you can optimise the results under CFL's,,,however you need a shit load of fittings, and the cost of which may exceed the cost of an HPS unit!. Although more fittings will be needed and the cost of the system would increase initially,the running costs of the CFL's would recuperate the difference on the first grow!
So to finnalize,,,, put every damn flourecent tube or CFL's light ya can get ya hands on, into that system! and come out smiling!

good luck,



welcome to the world of endless possibilities,,,,,hydroponics!