HO1R headlamp has a 1000 lumen XML2 LED - pretty bright one - so runtime with two batts about 2 hours on its turbo mode. But ... if walking/camping etc you'd be operating down on high or medium = 4-10 hours? Heaps. M1 Archer has only single cell to run its Luminus SST-40 high output 1650 lumen LED. Runs at max 800m for 3 minutes before stepping down to medium which is 575 meters. Didn't notice alot of difference between high and med out shooting recently. Runtime on one batt about 50mins?
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