Ok most my knowledge is with autoflowers. To do 10-15 properly you will need 3x5 area. Using square 3 gallon containers. 10 would be fine under 250 hps with some suplemental cfl on the sides. Running two different spectrums(3000k/6500k is fine. In fact i believe in mh/hps for complete grow when it comes to autoflowers and yeild. but that is just my beliefs. Anyway you would need quite a few cfls to get the job done for 10-15 plants. Just look for a hps on ebay or somthing reasonable. cause if this is somthing you are gonna do from time to time. You will be glad you did when you get some experience under your belt and want to step it up.