JTR, I've been meaning to post back in that original thread and tell you how happy I was with them

But just haven't gotten around to it yet.
They are not instant start, like they say on the box, takes a much as 3 seconds to actually light, but once lit they are excellent. Nice and bright.
I actually bought an inexpensive, but nice looking light for above my workbench in my office with the intent of putting one of the ballasts in there too, but it turns out that it wont fit in the case. That T8 fixture looks dim and anemic to me in comparison.
in the garage I've got all cool white bulbs, and they are great. In my office however I have put in the warmer ones as the cool just clashed funny with the rest of the lighting in here.
I actually hung the fixture from some paracord on 3 pulleys so that when I'm working on something very small, like SMT stuff I can lower it down and get it closer to the work, while not bumping my head on it the rest of the time. I may still have to hack in one of these ballasts, just screw it to the outside of the case or something...
I apologize for hijacking your thread BatteryCharger
As to those adaptors that let you put 2 bulbs in 1 socket, I think you SHOULD go out and get some!!! I've got 2 large lamps in our family room where the overhead lighting is either dim to non-existant, that i've done that to. I've 2 150 watt equivalent CF's in each lamp using one of those Y things and it really does help. And I'm still pulling about the same wattage as a 75 watt bulb. Amazing how much better you feel working in a place that is well lit! I want to see pictures of them with 10 CF's in each shoplight