Ya ive tryed cfls and although theyll do the trick,and if growing for your own personal its ok i guess.Deffently will save on elec costs.But trust me the only way of getting buds thatll blow your mind,thick,tight,big and gooey.
Ya need good light in flower at least.Yes more light is better.
My first grow i used cfl and once again thought pretty sweet harvest.Then i used 1000 watt hps and OMG.
Jus Sayn