you know saving energy on the ballast is pretty much a moot point. There's no such thing as putting in a 50 watt ballast and expecting it to put out 250 watts worth of light. If you really want to save energy then go out and buy some LED lights.
I am not sure you are understanding the question but thank you for the input.
I understand using another form of lighting would be cheaper but my question is changing what I have would it help at all energy wise as well as performance.