One of the best lights out there - Streamlight TLR-1 HL 1000 Lumens LED Tactical Weapon Light

I've got three of these lights two of which are the 800 Lumen HL model. The quality is top notch! It comes with everything you need to adapt and mount it to just about any pistol with a dust cover rail. The controls are intuitive and easy to reach. It throws an excellent wide beam that floods the area in front of the shooter with bright white light. I particularly like the strobe option the HL has.