the wattage really does not matter until your calculating electric bills. The lumen amount is what you should pay attention to. Yes, you can flower with florescent with decent results as long as you get enough of them to equate to a good amount of lumen output. And because your using cfls, and want the maximum amount of light (or lumens) per square foot, Its ideal to get that light as close as possible without burning foliage. I look at it like this: The sun hits the earth at an average of 10000 lumens per square foot. Because the sun is the ultimate light source, mimicing it as close as possible usually yeilds better plants.
They do look good too, your plants btw. hope at least some of this info helped...