Example of LD-B4HV build with Convoy C8 and XHP50.2 powered by 2x18350 aspire cells: C8 XHP50.2
Brightness is good, around 3300-3500lm, but tint is so terrible that it "kills" high lumen feel.
Also,beam is pretty wide, this LED is definitely too big for C8 size, undomed version would be just the right size with good amount of throw and brightness.