Here's the light - I did a bit of research and its got good reviews. I live out in the sticks so my commute home is in pitch black, I've got a 10W old bottle battery Cateye at the moment but they don't seem to do those any more
Lights are a minefield at the moment. Especially with the cheaper ones that are appearing on the market. I have heard of chargers setting alight and all sorts of problems.
A really good place to check up is the forums associated with Singletrack magazine. There are a lot of 'light' threads on there......
http://www.singletrackworld.com/forum/forum/bike-chat
I got an Airbike light from here......
http://www.on-one-shop.co.uk/acatalog/Lighting.html
Good spread of light for a bar mount. I still need a good helmet light though with a more focused beam to shine further down the trail.