You can grow maybe one...You will need better lights once you get into flowering because that just wont be enough light. I grow one plant at a time in my closet. I have 4 23w 6500K CFLs and 4 23w 2700K CFLs for the veg period. Once I go into flowering, those eight lights become supplemental lighting, and I add 4 42w 2700K CFLs above the plant for main flowering light. Using some bonsai techniques, I can keep the plant the size I want it and not have to get more lights than that. My grow space is only 1.5'x2'x4', so thats why I use CFL's. If you are looking to grow that many plants, and you have larger than a closet for a grow space...CFL's are not what you are looking for. You may want to look into an HID lighting setup like (High Pressure Sodium, or Metal Halide) for your growing needs.