Well, I've given the Myo XP 08 a fair crack of the whip now but have gone back to using the (much bulkier/heavier) Duo with 14LED module. It's old technology now but it definitely gives a much more runner-friendly light. A perfect wide cone of light at just the right intensity!
I think this is now year three with the Duo and i've seen nothing short of a Silva 480 that betters it as a running light. Manufacturers are too obsessed with beam length, when it's the
quality of light in the 5-20m range that really counts for night fellrunning.