Hi, I'm Mike and I'll be glad to assist you. Ray, changing to a T8 ballast will make starting at a lower temp possible. The ballasts are available for 4 lamp fixtures. The lamp sockets will have to be changed but they are available to universally fix the fixture you have.
So what I want to do is considered an OK idea. It sounds like I just need to make sure what ever I get will physically fit in the housing and I will be good to go.. Any idea of a good source for the replacement components, I was going to start at Home Depot or Lowes, we also have a Graingers in town.
The T* ballasts is electronic and physically smaller in size the magnetic ballast. I think Lowes would be my first choice for availability and price.
typo - T8
Just wanted to make sure what I was doing was do-able and an accepted practice, I will start looking around for the parts,I'll start at Lowes. Thanks for your help.