Yeah, 1 bulb per plant is a must. They will get bigger fast. You will need to add more bulbs for sure. 3 plants will require many cfl's. Keep the lights close. Very close. This is so important. Do yourself a big favor....Read the growFAQ, upper left on screen. Everything you need to know is there.
I'm harvesting my grow now. I flowered 6 plants using 850 watts of cfl's.
Do your homework and you can do it too! Good luck!