Shadow JM26 Driver (Place for more AMC7135)

Do you think 3.8A to 4.1A will make a difference in brightness? I'm wondering how Match's results (https://budgetlightforum.com/t/-/2346

) work in the real world myself. He shows a peak starting at 4.1A, but very little gain above 3.8A or so. Haven't come across any corraborating evidence in real flashlight tests.