The M60L is rated at 140 lumens, so it should be markedly brighter than the stock SF P60L (80 lumens), and I remember it was when I first got it. The Malkoff has only had maybe a few hours actual use. I tried a multi-level tailcap suggested in another thread here on my SF 6P with the M60L Malkoff drop in. It didn't work, the light flickered, flashed/blinked rapidly. I gave up on it and put them all away. Now, I notice that my M60L light is operating, but at a much less bright level, noticeably less than the stock P60L. I have tried different/fresh batteries, and even swapped the drop in to another host. It still works, just not as bright as it should be. Did I damage the innerds of the Malkoff drop in with this tailcap switch??