The most sophisticated, lightweight and reliable tactical lights available. Choose a xenon for a bright, long beam of light with adjustable focus. Or, a durable LED for a soft, super bright circle of light. Spare bulb included with xenon models (except in shock proof models). Anti-roll head on some LED models. Powered by lithium batteries, the professionals choice. Streamlight's new Night Com™ provides night vision capabilities and your choice of red or green LEDs. The Tactical Strion® has all the great features of the Strion® and adds the versatility of a grooved barrel for a secure gun mounting option.