If you're in a house, the power companies keep an eye on the power draw adding up to the sub-stations.....so many people have been caught growing exactly from what you are suggesting. It may take a year or two, but eventually they'll figure it out. It's not hard to do, but it's not worth the risks IMHO.
Actually, it's just easier to run an extension cord over to your neighbors deck and steal from them between 1AM -5AM each night.
