There is just a 10-lumen difference between high(80 lumen) and turbo(90 lumen). I don't really notice the difference between them. I have it standard on turbo-mode.
With the L2D-CE, the difference is a lot more noticebel(sp??)= 80/135 lumen
BTW: The P1D-CE and P3D-CE are even brighter (135/160 lumen), but they do run on CR123...
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