No flowering under flouros works fine, not as good as a sodium but a damn side cheaper.

Use cool white and warm white mixed . If you could get 1 more light 400w would be fine 200w is a bit low or a flouresant but if thats all you can get then give it a go.
When i started i used an old sunbed with eight 60w tubes and had some very nice stocky plants with some very nice bud on them.

The only ting is with them you need to start your flowering when they are about 4-5 inches tall so they will finish off about a just over a foot .
A flouresants effective light is very short so you need to keep the light 1-2 inches from the top of the plant thus moving it up every couple of days.
You won,t gain anythin by growing them bigger than this unless you have side light aswell.