Very nice gear. I'm particularly excited by the Ultralight stuff of course since I have the habit of promoting it. Mind, the closest I've come to the owner is via my favourite U/W Photography Forum and that was only by chance after years, at least a decade, of knowing him there and not knowing what he did.
Have a very similar set-up for my S95 with Fix housing, Fix UWL-04 lens and YS-110a strobe. I use the same tray, handles and arms. Currently using my old light cannon a video light but it is bulky and heavy so looking at other options.
Sola Light & Motion make specific lights for activities. Eg. Dive, Video, Photo. I have the Sola 800 Photo and have used it for short video clips and the result was ok but it would have been nice to compare the same using Sola Video light.
I've got the sola video 1200. I think the difference between the video and the dive is a ball mount or a goodman (I got both). It's a bright even light and I love that I can't flood it. Battery is less than an hour on full power but I tend to use 1/3 power. I use it as a second light when taking photos and a video light when doing video. Should the need series I can put it in narrow beam to look in holes.