I have the SC600w Mklll Hi now and am thinking about the new SC600w MK IV Plus with the XHP50.2 Emitter. My question is with the XHP50.2 emmiter what do you think the run times max on high could be! I assume this emitter is more efficient than the XHP35 but we are still using the same 18650 3500 mah 10 watt batteries so what is your guess that the max run time could be with this emitter pumping out 2300 lumens on HI 1. I am ready to pull the trigger but just want some opinions from those in the know about possible run times before I pre order.