I bought a pair of Dry-lights about a couple of years ago. There really isn't a good place to mount a light on them, at least nothing that's occurred to me though I haven't actually tried to engineer anything. You'd have to attach something to them to make that work I think.

They are completely waterproof though and they really are very light. The only thing is that they are pretty slow to mount and take off, but that's just the way they are designed.