people have report ~90 lumens, I've done this mod and its absolutly worth it. I've done a side by side with a P1D-CE running recharables 123, its hard to tell which is brighter. I also completed the 2 stage Low/High mod by soldering a 1/4 watt 10ohm resistor to the tailcap. awesome mod and would recommend this as well.you get press soft for temporary low or hard for temporary high, twist tight for constant low and press hard for temporary high or click it for constant high.