Ok, I don't want to put you down, but if your asking that questiuon then you didn't at all understand this post or the principal of overdriving lights. The idea is to use an electronic ballast designed to power 2 or 4 tubes, and use it to overpower 1 or 2 tubes, thus giving you more watts per tube in less space.
If you are not 100% sure what you are doing, please don't continue, I don't want to read a post on here that you burned your house down while trying to do this.