I asked the guy at the parts counter about the bulbs and he said that as long as you don't touch the bulb glass (and get finger oil on it) they will last as long as any other headlight bulb.

I guess I'll report back in 9 -12 months.

These screws were basically (and still are) fused solid in to the metal bracket. No amount of impact or shock would get them out without damaging the surrounding material. The Grabit would have done it if they were going to turn - obviously I had sufficient torque - but the rust won out over the shear strength of the head to the shaft.