To compare some high throw flashlights at high mode:
Convoy L21A CULPM1 680lm for around 110 minutes (Samsung 30T 3000mAh)
Convoy L21A XHP35HI 96min (it should be about 1000lm-1100lm, high mode has 55% of the output of turbo) vs SST40 6A driver 135min (700 lm for the M21B with same driver) (Littokala 4000mAh???), the XHP35 HI is brighter and has more throw.
Wowtac A4v2 XHP35HI 1050lm avg for a bit over 90min (5000mAh 26650)
Acebeam L18 (CSLPM1) 586lm for 106min (5100 mAh 21700 from Acebeam). The Convoy got the same runtime with a smaller battery. On the other hand Lumeniac got 390lm for 258min, so something doesn’t make sense with 1lumen review.
Manker UC22 III (CSLPM1) they claim 710lm for 144min (4800mAh) battery. The II version has a regulated output, so I would trust that runtime, I’m not sure if I would trust the output, but it looks reasonable compared with the Convoy. I found no technical review for it.
Sofirn SF47T (CULPM1) about 600lm for 251min (2 x Sofirn 5000mAh)
Lumen output are not exactly comparable because of different meter calibrations.