Not sure what your referring to. But I believe a Xhp50 or Xhp70 in single High mode in this light should fit the definition of pocket rocket. (Or do you mean, the flashlights actual size?)

You must be kidding about a S2+ would be brighter, rocket wise than a Xhp50.2 in this light.

I have a S2+ in XP-L Hi and its meh, not impressive, it okay for a newbe starter light.