I like the design of your helmet light. You should use it as a bar light. I think this design has two very reconsidered aspects. You can use the bike bar as a kind of heatsink and the light will stay very solid on the bike bar. I like it very much :twothumbs.
nice!! this is a great design definitely worth pursuing and improving,
i love the low profile, and simple minimalistic looks,
and a lot easier to knock up than your stem light eh! :thumbsup:
maybe a few grooves to increase the surface area ....
top job as usual Mr Trout!