I have seen a few people ask about these extenders in the past. I currently use 2 malkoff bulbs. A M60LF and a M60LL. I use these in a 6PD and a G2. With the extender on the 6PD will I get extended run times? The bulbs are rated up to 9 volts. Am I correct in assuming that with three cells it will not be brighter, but instead giving me more runtime?