The X21 is a large searchlight. It features 7 LEDs that produce a maximum light output of 1100 lumens. There are other torches on the market that produce more light. However, these torches are missing the one very important feature that the X21 model has, and that is its adjustable torch head. This feature allows the beam to be adjusted dynamically, producing a wide circular low beam as well as a sharply focused beam.
If you do not need the high mode setting, you can switch to the low mode (the precise light output is not specified by Led Lenser).
The X21 is powered by 4 Alkaline D cell batteries, which are included.