HO T5 bulbs are so much cheaper than the MH or CF lights. This is the best option IMO. 2 48" bulbs can be purchased online for only $20. The lumens on bulbs like this are 5,000 lumens each. A single CF bulb runs more than $25, and only put out 3,900 lumens, yet the CF bulb uses 65W to the HO T5's 54W.