Stelios - JoeyS recently posted a link to this
Zebralight in another thread. I realize we've both just gone out and spent a wad of money on the Fenix flashlights... but I wonder if a wide-angle light like this might be useful with a helmet cam? It's limited for throw range and will probably be a little blinding to anyone you're caving with, but it might work well for illuminating anything within a body length or so.
I've been happy with my Fenix AA flashlight. Reading the specs, I expected it to eat through batteries on high power. It seems to do better with NiMHs than alkalines, and it does really well on the 3v lithium cell I have in there right now. If I'm using it with the ATC2K, I'm limited to an hour of shooting time anyway (2GB card, highest quality).
Yes, like the PT Apex high beam, the Fenix beam is really a little tight for good results. I wonder how it would work if we supplemented our regular helmet cam lighting with a wide angle IR LED light?
I hope to post the results and observations of my first in-cave helmet cam experiences soon. I just have to make the time to do it!