Thats not what you NEED to do to grow good cannibis. I know people that grow some beaufitul buds off of nothing more than a good setup of CFs and some good soil..

But smoker4life you cant expect a large flowering plant to get the right nutrition it needs from a weak light source. A 125W growbulb is meant for, most likely, non-flowering, indoor plants. The grow light may be good for veggin, but if you intend to go into flowering you should put at LEAST like two Compact Flourescents on it..