With the Cree R2 this sucker is bright on nimh with good runtime
, and if you plan on using a lith cell this sucker gets even brighter. The smooth reflector works the beam nicely which for me makes this light a small pocket thrower. You can change modes via the switch on the side of the head which is low, medium, high, and of course strobe. Unlike there C series this one has a switch to change modes instead of twisting the bezel to get the light output to ramp up or down. You can still ramp up or down with the SA1 if you hold the tiny switch down when the light is on.