The LED Lenser P3 Tactical is under four inches long and about as big around as a pen, making it perfect for a pocket. It boasts a robust, lightweight, shower proof aircraft aluminium casing, its advanced focus systems letting you adjust from spot to flood beam: in fact you can speed focus one-handed. The switch is on the rear tail cap and you'll enjoy an effective range of 141 feet and a burn time of up to 40 hours. LEDs LEDs have no filaments therefore the bulb never needs replacing. The lifespan of an LED is 100,000 hours, which is 11 years on continuous use.