Helmet torch modding

rowlers
rowlers Posts: 1,614
edited October 2013 in Road buying advice
Just took delivery of these:
http://dx.com/p/fandyfire-a10b-cree-xm- ... 8650-90607
http://dx.com/p/fandyfire-hd2011-cree-x ... 650-107152
hoping one would be perfect to use on the helmet. They are certainly small and bright enough, but I was hoping for a tighter spot. Any one of you light gurus know how I can tighten the spot a little?
Or recommend a similar sized 18650 torch to fit my Lezyne helmet mount?

Cheers