ok, now that I had my smart ass post and you didn't cry like a baby about it I'll throw some advice your way. It seems like security or what not isn't a huge concern as your shit is just out in the open, which is fine. If your going to grow 6 plants.. your going to want a 400 watt HID light for them. All light is not created equal and the light coming off a CFL simply does not have the penetrating power that a HID bulb has. So by the time you buy all those expensive CFLs and string them together in some sort of screwball fashion, you could have bought a "real" grow light and harvested a pound.
A 400w hood, ballast, and bulb will run you about $250? Decent nutrients will cost you another $100. If your growing in the open your not going to have to worry so much about regulating temperature and humidity and what not and you still get a good harvest. Plus, you'll have a "legit" system that will have the capacity to turn out some nice sized and potent buds...IF you do your homework.
Many ways to skin a cat my friend. I'm likely quite a bit older than you so unfortunately I don't have a shit load of free time. If I did, playing around with some CFL''s and what not probably not too bad of an idea. The only other catch is that production of schedule a narcotics is not something you want to deal with. So why take the risk if your not going to reap some serious benefits from it? I mean, it not like the cops are going to say "awww,come on, this is like 6 weak sauce plants under common CFLs; Lets just let him off with a warning". Just something to think about.