Just got to give a quick plug to CandBSeen for their customer service.
I bought one of their 1200 lumen searchlights, err, front lights last year and for off road use it was brilliant (literally!) ( http://www.candb-seen.co.uk/bikehead-lights/cabs-02-series---cree-xml.html )
Well this year when I went to use it the switch failed, so on Monday I used their contact form on the website to ask about how I could get it repaired or replaced, within an hour I got a reply that they'd send a replacement and confirming my address is unchanged, Tuesday morning I got a shiny hew head unit *and* a stamped addressed jiffy bag to send the old one back in. Top service and I am impressed :-)
Bottom line, if you want a cheap(ish) light for unlit paths/trails (but not really for the road, too bright and not a shaped beam) then give these guys some consideration :-)