Interesting, FYI the link you give is to 4 units, they do sell single units as well, which I assume you meant to link to.
I pulled my Durst 1000 to pieces today as the mechanism which allowed me to adjust the head height failed. While it is down I considered converting it to a diffuser type by removing the condenser lens and painting the space white and adding diffuser. I might consider one of these lamps at the same time based on your tests. So get going....

How deep is the light?