These lamps are technological dynamite. Their core piece is the Advanced Focus System and lens technology. A double-shell reflector-lens allows for stageless transition from broad floodlight to a sharply focused long-distance beam. The initial appeal of the new LED LENSER flash lights lies in its grace and dynamic elegance. But what's inside the beautiful housings is even more enthralling: These lamps are technological dynamite. Their core piece is the Advanced Focus System (starting with LED LENSER® P5). This lens technology, represents a milestone in the history of artificial light. Press the push button gently to make the white beam of LED LENSER® appear before your eyes like a cathedral of light. A double-shell reflector-lens (patent pending) allows for stageless transition from broad floodlight to sharply focused long-distance beam. Most of these lamps are equipped with a new generation of 3 watt chips. The LED LENSER® F1 is not for those with weak nerves. We call it the fighter jet amongst small-flashlights. What this lighting powerhouse has concealed inside a minimally dimensioned package, is simply breath-taking: 400 Lumen from a single CR123 battery! This world best is achieved by the LED LENSER® F1 as one of the first in its class. But that is just the beginning : HA III anodising in accordance with military standards, watertight (IPX8), electronic regulation with a temperature sensor, tail stand, replaceable glass breakage ring and usage optimized lighting are facts that will convince even the most demanding expert. You'd best get a LED LENSER® F1 fighter jet installed in the hangar at your home as soon as you can. LED Xtreme Power LED Length 88 mm Weight 69 g Luminous flux 400 lm* Batteries Lithium CR123 Energy tank 3,9 Wh Burning life 120 Min* Beam range 100 m*