Welcome to BLF, cehoward! Fellow cyclist here, more of a refuge from mtbr forums since the night riding season has died down a bit. Flashlights are a whole different world.
I'm not expert on mounts or bikelights but you can take 504 xmlTF flame batteries and charger for 26$ using the coupon oneworldweshare, for less light but more throw and autonomy can take an XPG was 10$ the 504b with that led on Dinodirect time ago
The night/morning dark ride is sweet with ample lights. I plan on running double flashlights up front, one on helmet, and double bright blinkees in the back, plus a blinky on the back of my helmet too.
We gotta be seen... :)
BTW, after just a couple hours of reading some threads, I have already eyes on more flashes.. :)
Hiya Don, thanks for the welcome.. To tell the truth, I am easing down off the speed thing. Hence the bicycle.. Nice way to calm me down after doing this...:) I am up front, #630... :)