Xenon is the best performing bulb filling gas and provides the maximum lumen per watt over the other gases for incandescent lamps. X2's xenon light source generates an amazing 70 lumens of powerful light collimated by our proprietary reflector designed for focusing the light generated into a smooth intensified light beam. The light beam is pre-focused at the factory for maximal center intensity in achieving the greatest distance. The lamp assembly is completely isolated from the rest of the light while the batteries are compartmentalized to provide X2 with excellent performance against weapon recoil. The "flaming heat-sink" design of the head ensures adequate heat dissipation for thermal management of the xenon bulb in lengthening its bulb life and optimizing its performance. X2 is crafted out of aerospace grade aluminum tube using precision CNC machine in anti-reflective, anti-corrosive, and anti-abrasive military spec Type III hard anodized exterior finish. All connections are sealed with double O-rings for extra protection against water leakage. X2 is not just a limited use incandescent light, since its head is interchangeable for alternate light sources from a diverse selection of conversion heads available separately, so your initial investment for a high quality flashlight is maximized. The 1" diamond knurl area of the body is suitable for securing gun-mounts. Our patented waterproofed twist for constant on/off and push for momentary on/off PentagonLight