At first its seemed to hold ok for me but on the pretty bumpy stuff it moved about a bit.
Thought I'd report back after my first commute(s) with this light, and all I can say is...... it's magic!
Last night the road surfaces were damp, which usually soaks up the light from my Moon, but I felt much, much more confident with the XML-T6, as it had the 'car headlight' feel about it that I was hoping for, and definitely lit up the road surface better. It's worth mentioning perhaps that I haven't tried it without the diffuser lens (as I chose to pop that in right from the outset), but the spread of light is great – wide enough to light up the lane, with good illumination of the verges and in front of the wheel.
The brightest part of the diffused beam wasn't as significantly brighter than the Moon as I was expecting, but there is definitely far more 'usable' light. I'm pointing down of course, and wasn't flashed once by oncoming traffic, even when using the highest setting, so although this light is bright, I'm happy enough that I'm being as socially responsible as possible with it. Becoming more aware of just how bright some of the LED running lights and headlights are on cars these days though!
As for the O-rings, well I was pleasantly surprised there – there's no doubt it needs a proper mount (and I have a plan on that front
), but I was eye-balling the outer ring of illumination in relation to my front tyre, and it didn't seem to move about at all, unless of course I fiddled with the light position.
My commute last night was ~55 minutes, and the light was mostly on the medium setting, dropping to low when there was street-lighting, and up to high when I was on those dark back roads. The switch was still illuminated 'green' when I got home. This morning was bright enough such that I started on the medium setting, but dropped to low just for visibilities sake after about 15 minutes, and completely switched off for the last 10-15 minutes or so. So after ~1hr 40mins, the switch was still illuminated green, but with a definite blue tinge – not sure if the green light should've gone off, but it definitely looks like a second LED has come on.
So first impressions are extremely positive... only problem is I ripped the strap off the battery bag removing it last night