The XHP70.2 can withstand over 20 Amperes, delivering about 9,000 lumens. (Test of the XHP70.2 here)
But you have to ensure for the best possible cooling. In a flashlight this might be not always the case.
Such high currents like above 5 Amps or so are best measured with a non-contact clamp meter because the internal resistance of the multimeter and the wires can cause big differences of measured vs. real current.