There are two main problems with having powerful high beam headlights, first is the difference when switching to low beams is so pronounced, it is like turning your headlights off, until you eyes re-adjust. I only use the roof lights when there is not likely to be much traffic, as the lower ones are quite good by themselves. The real advantage of the roof lights is the ability to see the washouts and over the small bumps on dirt roads. They help lighting up over the crest of hills, giving an extra 50m or so distance which can be quite important.
The second thing is the reflections back from road signs, they are very bright,and it mean you can' read them at all until they get closer. The yellow speed advisory sign are pretty important to us, as they are how fast we need to go around the corner. Normally we are driving slower than we do during the day, especially on twisty roads, so not a problem. The upside is that you can see the corner coming up like it was daylight.
The video will be another couple of week away, we need some more footage to make it more interesting.