It's an old T12 fixture with a very old ballast.
1. replace the T12 ballast with a modern electronic one
2. replace the fixture with T8 or T5
3. replace the tubes or the fixture with LED tubes. They would have to be the kind that don't use the existing ballast.
4. something else I haven't thought of
My goals are lots of light (this is my music and DIY projects room), and lo ng life (I'm old enough to think about jobs I won't have to do again.) I d on't care much about energy efficiency as all the solutions are reasonable.
These are tube fluorescents, not CFLs, but the short life of CFLs has me a little worried about LEDs. It's always the electronic driver that fails, n ot the light source itself. We've found at work that with some energy savi ngs projects, when they do fail you rip them out and start over, because af ter a couple of years the company is out of business and you can't get part s.