My own impressions of the light are that in an urban environment, you will get a discernable difference at 200 feet, enough to spot anything that should or shouldn't be there. In a very dark setting, you can get a similar result at 250, maybe 300 feet. The light still outputs a lot of spill, so it's not a throw monster in any case. The benefits are mainly in the tint of the light, and a slight increase in lumens.
The Aspheric mod clearly lights up trees, houses etc at 300+ feet in an urban setting, have not tried it in a really dark setting yet.
vetkaw63, I used a diamond sharpening stone to grind down the lense to fit the bezel, but have since discarded that approach. Now, I have ground down the C2 bezel so it is completely flat, and then simply attached the unmodified lense to the end of the bezel.
Voila! A perfectly focused beam. A piece of PVC pipe now protects the lense from drop damage, the light looks good, and the throw is excellent.
Firstly, a rather poor beamshot. The photo is rather overexposed, in real life, the die of the LEd is projected perfectly onto the wall. Throw distance is about 12 metres, spot diameter is about 60 cm.
Showing the relative sizes between stock unmodified Q5 C2 and modified C2
And here you can see the aspheric lense and PVC protecting pipe
I am really happy with this mod, I can't see any way to advance it any further yet, unless I do a driver mod to try and run it at a higher current. But the two lights sit quite happily on my bike handlebars, great spill, awesome throw, scares the crap out of unsuspecting pedestrians
