And to use such a low amount of watts you would need to be growing in a pretty confined space to make the most of that light.
You can pull it off but you should do the research first so that you don't EMT up with some lanky root bound hermaphrodite plant.
And you def gonna be growing the plant for at least 3 month, for like a couple weeks worth of smoke at best probably lol, SO.
If you're gonna do it, do it boss. If you can't afford a few more CFLs at the moment you should probably hold on the OP.
The better you plan and execute, the easier the grow and better the end result!
My 2cents haha! Good luck wit it
edit- I say if your gonna go CFLs, go with a grotesque amount hahahah