Use those cfls in your house to offset the cost of growing with hids. wiring up 20 cfls will cost more in power bars and sockets than the 2 hid's I'm using now, cfls require constant adjustment when growing, sometimes they fall over into your plants, also adjusting 20 cfls takes hours per week; lifting my hood takes 12 seconds.
"Anyone who tells you cfls don't work is an idiot, anyone who compares cfls to hid's is a fool"