the XML`s dont come alive until 1.5 amps drive and peak at just over 3 amps .
Nothing wrong with the XPGs as Rob says and also there has just been released the XPG2 with more lumens at a higher temperature with slightly lower forward voltages so even better suited to the Dyno drive .
It does look like for the serious rider in the dark a Dyno setup after you have invested in the wheel is a great idea and good for the planet too.
I do suspect the continuation of the XPG by the main players also has a little to do with using up existing stocks .
wont be long before the chinese have a dyno and charge all gadget light out if they see the Exposure one selling well .