Hux's photo is a 5 second exposure - if I took a 20 second exposure of my £5 bikehut light then it would appear brighter
Not quite, f6 i believe it's the standard setting for when taking pictures of any light ask those on mtbr and candlepower forums.
Plus it was the only way i could get a decent picture anyway otherwise the camera would adapt for the light settings, anyway sdk the light believe it or not is actually brighter in person, i actually find it a bit much and have had headaches if left on for too long, when newer led's come out i'll opt for a softer colour option as it's be far less straining and not cast shadows everywhere so ppl shouldn't fuss about their light disappearing.
Shimano discs err i think they'll be centrelock so you use a hg cassette tool to undo the spline in the middle.
Anyway just google lumen liberator, i did a thread on bike radar about it as im the resident led nut, you'll see a p7 led comparison shot plus some other folk with the same unit, a friend has a lupine betty, her light near vanished when mine came along.
The led's glow green when the unit it off, troutie put a couple **** of uv paint on each led so should it fly off you can still find it, it also has a lexan bottom which is great for lighting the trail underneath so you don't end up crashing into something low down unlike more traditional lights.