No hard feelings; this is just one of those questions that gets asked meelions and meelions of times, often by aspiring cashcroppers trying to figure out how fast they will be able to pay off their credit card...

With CFLs, your results are widely variable. But let me tell you one thing... they depend primarily on getting a plant to survive to harvest, and matching your watering routine, size and type of pot and medium, and ventilation in your cabinet are crucial to this more than anything else. Don't over-love your plants!

IMVHO, CFLs are largely for learning. And in the learning time, your main yield will be what stays with you forever- basic grow skills. You can budget your yields better in the future under HID lights with more space to work in, but for now, concentrate on a healthy plant.

Good luck.