The florescent bulbs and light kit arrived this week and it was good to see the results of my research. I only found one problem in that the 105W (400W incandescent equivalent) daylight-balanced florescent bulbs were so large the base of the bulb prevented them from fitting into the fixtures.
I expected they would be bigger than usual, but (in the photos) its amazing how much larger they are than a standard 15W (40W equivalent) florescent bulb. To reiterate, the part you screw into the fixture is a standard (E26) Edison Screw type cap, the same type found on most home incandescent and CFL bulbs.
I was able to solve the problem for less than $5 at the local big box hardware store with two $2 fixture extenders, and luckily the rod of the reflector umbrellas just barely clear the big bulbs.
The fixtures are made to carry 250W so it is fine that my bulbs only draw 105W each. The adjustable mount for the lamp fixtures, however, are a little precarious. They are not made to support the weight of these larger bulbs along with the umbrellas so I had to tighten them more than usual. In the future I may find a better solution, but for this project they will do fine.
Here are some initial tests with the kit and bulbs. These were shot with one light in Camera Raw with a Canon G9, ASA 100, f/3.2 @ 1/13 between 6-10′ from the lights.
And these at f/4 @ 1/13 with both lights at around the same distance.