Thanks Greywolf & Jhannon, your suggestions sound reasonable except for my electronics illiteracy. As to a "competent techie" I used to know several and I'll have to scare one up for this. If I have to pay for repairs I think I'd rather go Jeremy's way and save for a metrolux.
I still wonder about changes in contrast as the on/off cycle length will change the color spectrum of the bulbs light which might cause a contrast shift. I'll have to daydream about how to test for this but my guess is that for my purposes it is a non-problem.