I’ve been running one step down from dull brightness. My plan is/was to replace batteries every two weeks but I have a new battery cap at work and was waiting to switch until I get the new cap (been on vacation this past week)… I know 3 weeks to a month or more is probably fine, but I like the consistency of every two weeks to switch.
I want to play around a bit more with full bright daylight because at one point I felt max setting was best, but carrying it I’m more thinking that one step down is better overall.