My 2'nd light mod was a ROP high in a 5C mag. It uses 6 sub c 4200. I needed to do a tail cap mod to get 6 into the light. I also ran a wire from top to bottom of the tailcap spring to lower resistance in the circuit. I bought Powerizer brand sub c's off eBay and I'm not very happy with them. If you use C lithiums in a 5 or 6 cell light, you've got some serious voltage potential. So if we're looking at 18.5 to 22.2 volt packs at 3.3 ah and find a bulb to run at those levels, what are the amp loads going to be? Will regulation be required because of the significant voltage range as the pack drains? Are we now over 10 amps and maybe need something more than a KIU socket switch mod? Will whatever bulb you choose, running at those levels, generate so much heat that you have to keep runs to 4 or 5 minutes? Willl all of your runs be prefaced with, "Hey guys, watch THIS!" What great problems to have! If you look at a C nimh solution the pack voltages hit 6 to 7.2 at plus or minus 5ah and you're aleady familiar with ROP and probably the phillips 5761. I'm just starting to play with the phillips bulb and like what it does. Sub c's bump those packs to 7.2 or 8.4 volts at 3.8 to 4.5 ah. ( All the pack voltages are assuming straight series, obviously.) Personally I feel these size mags are more appropriate for nimh because I think there may be less need for regulation at lower pack voltages. If someone develops a DIY regulation circuit for the person that can read scematics and solder breadboard projects, but is not up to designing circuits and specing devices these bigger mags would really shine. Yeah, I know, sorry.
John
