The LED light source has no filament to burn out or break and therefore has the potential to lasts thousands of hours. It proves brighter then a 4 D cell flashlight. This L4 model comes standard with rugged aerospace grade aluminum body which is Mil-Spec Type III hard anodized. It is o-ring sealed and weatherproof. The tempered Pyrex window will protect the LED lightsource. This model comes standard with 2 high energy lithium batteries with 10 year shelf life. The metallic vapor coated reflector eliminates spots in beams. The pocket clip makes this model convenient to carry with you at all times. Also comes standard with a Z50 lanyard. Switch lockout prevents accidental activation during transport or storage.

Extremely compact (shirt pocket size) high-intensity LED flashlight for self-defense and general use. Shirt pocket size flashlight uses a virtually indestructible power-regulated light-emitting diode (LED) to produce a smooth, brilliant, pre-focused tactical-level beam almost seven times the light of a big two D-cell flashlight - bright enough to temporarily blind and disorient a person by impairing his night-adapted vision. Small size and high output also make it a perfect everyday-carry light. SureFire's LED pocket powerhouse.