The Fury IntelliBeamA(R) is a unique and versatile pocket searchlight that can easily adapt to your changing lighting needs. This light combines the powerful 1,500-lumen capability of the Fury DFT with SureFire&';s exclusive IntelliBeamA(R) circuitry. The IntelliBeam technology automatically and seamlessly adjusts the output of the light to the optimal setting, which can range from 15 to 1,500 lumens, depending on the environment. Alternatively, you can quickly double click the tailcap to bypass the automatic adjustment function. This means you don&';t have to hesitate or fumble around to manually adjust the output. The Fury IntelliBeamA(R) is reliable and can help keep you calm in tense situations.