I grew 3 plants with a 300 watt cfl,200 watt & 9 100 watt. They did pretty good. I may have had a little much for 3 plants but all those bulbs were just over 20,000 lumins and my new HPS/MH is 70,000 to 90,000 depending on which bulb you use.
Does anyone know how many lumins you need?