Ok, I have a 12aa d mag using a Osram 64633 bulb. The amount of light this thing puts out is crazy! I wanted a fire starter and this is it! I have a lot of people to thank here for making this possible, but a special thanks to Fivemega who answered a lot of newbie questions. Also I would like to report that I'm no longer a virgin. That's what happens when you put in a 64610 and forget to remove the extra cell. The only problem is, it seems as if I have no throw. My Mag85 with 3 18650's throws further. The light has the Elite 1700 cells with what appears to be a LOP reflector. The reflector is camless and I have tried turning the head to improve throw, but no luck. However, the reflector does look different then the other ones I have. Take a look at the pic. Would this make a difference in the throw? Thanks again....Sid