I did my first grow cfls and they just didnt cut it. my plants grew well and healthy but when it came to bud production it was super week. im now using two 1000w MH light setups which costed me around $900 - $1000 for everything, the ballast, reflector, and light. I reccomend the most watts your willing to buy the better. and for electricity costs, half of one plant under theese lightings should produce enough yeild to pay for the elec. bill 3 times over. My plants are growing an inch a day! OH Yeah---DONT BUY USED LIGHTS OR LIGHTING SYSTEMS! this will result in a broken set 5 months down the line, invest in new stock.