bit of an update!
Been using the X3 for a couple of sub 30 minute sprints as I'm not man enough to brave this weather for much longer than that at the moment! Very bright, still trying to work out the best balance of downward tilt to avoid dazzling oncomers and making sure I can still see fallen branches and potholes in the middle distance. Battery tends to last about 5 or 6 of these short hops before needing a charge, mainly used on low.
Oh, and riding in rain with this thing on full is interesting, I get dazzled by the reflection in the raindrops if I'm not careful!