I'm thinking of buying a Led Lenser P7 with bike mount. Also a torch but it has different settings and an adjustable beam. 200 Lumen max. output too.
I probably wouldn't. Check, but afaik Lenser's aren't "regulated". This is the most useful feature of a good LED torch - it means that brightness is kept largely constant as the battery runs down. Unregulated lights start bright and drop very fast. Typically a 200L unregulated light will be a 200L for five or ten minutes, average 50L for the next fours, and then whimper on it on an average of 5L for the next 2 days. This gets written up as "200L maximum output! 2 day battery life!" by the ad people. A Fenix would be much better.
Zoom optics tend not to work well with torches, especially LEDs. You get dark rings in the beam, which can be a pain if you're trying to avoid obstacles.