I was told by an unofficial source that the same bulb is used by the StreamLight SL35X and the SureFire 12PM N62 Lamp Module. 20W 6V or something.
The SL35X has a beam that can illuminate at longer range, but the beam of SureFire is so much better. It is also no designed to illuminate at such long range - more to flood the area with blinding quality light - a wall of light for closer range requirements.
The Extended Range TurboHead (3" diameter Reflector) produces a tighter beam for more intense longer range illumination... I know, I've got one.
If only I could get a 3" or larger reflector for the M6!
Al