I'm torn between the Mag-Lite ML50LX in the 2-C battery vs the ML300LX in a 2 cell-D battery. The lumen difference is 34 lumens with the D cell being brighter and having a further beam distance by 66 meters. The 2D has a peak beam intensity of 33,573 vs the 2C at 22,400 for the FL 1 standard. But where I'm surprised is the 2 C cell has a run time on high of 15 hours where the 2D is 6.5 hours. Is the 2C the obvious choice, or am I missing something with the 2D?