This is a Surefire Flashlight known as the Everyday Carry Light, model EDCL2-T.
The Everyday Carry Light 2" an upgraded version of SureFire's popular EB2 Backup(R). Otherwise it's all about bold" in-your-face performance" with its high-output LED delivering 1"200 lumens of blinding white light on high and a useful 5 lumens on low. A Total Internal Reflection (TIR) lens shapes the virtually indestructible LED's light into a versatile beam with plenty of throw but optimized for situational awareness" essential in an everyday carry light.
Features:
Highly versatile light
Virtually indestructible LED
Fully press tail cap switch for high output, and slightly press tail cap switch for low