Hi, mikeskim.
IMHO, two main factors would come into mind if I were choosing a keychain light:
1) Runtime vs brightness
2) Small 'enough' to be a keychain light
I would say ARC(which no longer produces) and Peak LED solution makes pretty good keychain light using easy-to-find AAA; orelse I would suggest Photon for an even shorter form.
Personally, I have both Photon III and Freedom, but I do prefer III over Freedom since it has an auto turn-off function and it will remember which 'state' it was in(strobe, low light, etc).
Good luck searching! /ubbthreads/images/graemlins/smile.gif
btw, some may argue that 'form' factor is never a real consideration for a flashaholic... /ubbthreads/images/graemlins/grin.gif
('Real men carry an Ultra Stinger on their keychains,' said powernoodle. Original post please see
here)