If you read the link I provided, most of your questions will probably be answered. Like imow said, the guy who started this measured the output of the bulbs with a light meter--the numbers and formulas get a little intense, but he's got them all there.
One reason you don't hear about this is because the big companies aren't going to promote it. IceCap has run some tests, and they will admit that you can run NO bulbs on their ballasts. Most people just aren't trying it...a little too unconventional for some people's tastes. Who knows. It's relatively new, so it may take some time to catch on. I checked out the home BB of the engineer (reefburnaby) who started the thread, and it looks like it is really catching on over there.
One reason you don't hear about this is because the big companies aren't going to promote it. IceCap has run some tests, and they will admit that you can run NO bulbs on their ballasts. Most people just aren't trying it...a little too unconventional for some people's tastes. Who knows. It's relatively new, so it may take some time to catch on. I checked out the home BB of the engineer (reefburnaby) who started the thread, and it looks like it is really catching on over there.