What emitter for 78mm Aspheric Project

XPG2 or XML2 either one will be on a copper sink pad and driven to near maximum levels. Batteries will be 3 18650, parallel with the xpg and probably series with the XML. The lens in the KD 78mm

I’d say XRE2 for maximum throw and smallest hotspot.
XML2 for maximum output and largest hotspot.
XPG2 for a compromise between the two.

The host is my first non mag based light. Although i did use the same head thread size as mag because I had previously unsuccessfully put the head on a mag

Is that really only 3 18650s? It looks like it can fit in at least 6 or 8.

I should have put something in the pic for scale.