Cheers everyone, bar mounted is first choice
Personally I’d say if you can only have one, put it on the head, so you can see where you’re going not where your bars are pointed. Doubly important if you buy a cheapo XML as the beam is very tight.
On that note- if you’re buying cheap lights, there’s still a lot to be said for the outmoded P7 lights- they’re not as bright, but they have a much better beam pattern than the XMLs.
I just recently got one of these, more or less on a whim… And it’s as rough as a badger’s arse, the design’s flaky and it’d not that well made. But on the other hand, it’s a deathray for £35. Can probably be had for less.
http://www.ebay.co.uk/itm/4000Lm-3x-CREE-XM-L-T6-LED-Bicycle-bike-HeadLight-Lamp-Light-Headlamp-A4-3T6-25W-/170934864424?pt=UK_SportsLeisure_Camping_LightsLanternsTorches&var=&hash=item27cc830a28