You might try that test with a different set of batteries, and/or, make sure that they are each fully charged before you start the test.DO NOT TRUST/BELIEVE THOSE CLAIMS. The FL1 standard allows run time claimed to include dimming to 10% of the light level at start. And that assumes that your light & battery match the test unit.
My Acebeam E70 runs at the 650L level LONGER & BRIGHTER on a 3000mah battery than it does on a 5000mah battery. At the 180L level the 5000mah battery runs longer, as you would expect