The XP-G3 and the mystery of the disappearing luminance

Oh yes! I finished my build in May. Documented here: DIY Offroad LED Light Bar It will be more like 45 root canals.

I’m a noob and didn’t understand the factors that affect throw, so I was solely focused (no pun intended) on lumens per watt and the G3 looked best on paper. Now my beam pattern is broader than I wanted, so I’ve been searching for ways to improve it and found what a tremendous resource this board is.
I’ve ordered some XP-G2 S4 E3s to compare to the G3s I have.