Today's tactical illumination systems are to the flashlights of yesteryear what the Xbox360 is to Atari. Case in point, Elzetta has developed a light magnification system — called the High Output Head — that can beef up your beam to throw a scorching 600 to 900 lumens.
Just to give you an idea of how bright that really is, it actually comes with a setting to turn down the brightness, as it can be overwhelming in close quarters.
The High Output Head can be attached to existing Elzetta flashlights or can be purchased as new on products from their line.
Source: PFCtraining.com and AR15.com.