There are some things I don’t understand. I have modified two CULPM1/CSLPM1 flashlights. I tried to keep them at the same focal point, and the SFT25R brought a measurable improvement at the same current.
Although I used a cell phone to measure, I used the same setup as in many previous tests, all measured at 5m. The SFT25R consistently produced higher numbers than ever before.
Why is this? The luminance of the SFT25R doesn’t seem to be as high as the CSLPM1. Could it be that the round die provides better optics, or is there some other variable at play?