LF17 tactical LED torch light use 1pc high performance CREE XM-L2 LED generates max 800lm output. The lamp is powered by a 18650 battery to support at least 1.5 hours non-stop lighting. Areo-space aluminum material with hard anodized surface finish make the light much more durable. Ultra slim design, quick click the button to switch high, med, low, strobe modes after to turn on the light.