- Re the Motolights, they're very well made, no plastic, etc., and the price (ouch?) reflects that. Those are Motolight caliper mounts with their lights (
http://www.motolight.com/motolight-lights ); they make different caliper brackets for different bikes, varying the size of the bolt holes and included bolts, while the light assembly is the same. Very good for conspicuity and road-shoulder lighting, as I mentioned, because of the wide beam (which also means not so good for lighting up down the road).
This particular set of Motolights is going on five or six years, now on its second bike; all I had to do was spend something like $30 to get the appropriate caliper mounts. You can see larger pics of this setup in my gallery. I also had a set of Motolights on my 1997 BMW R850R, but I sold those with that bike in 2000.
- If you're really almost exclusively interested in being seen, perhaps even better conspicuity might result from using the Photon Blasters,
http://www.skenedesign.com/lights/PB_Features.shtml . These have gotten good reviews in some BMW forums, are cheaper than Motolights, and may be more eye-catching (particularly in amber).
Lots of choices out there!