Not super picky on the specs, basically "bright enough to work and long enough runtime to not worry about it." Looking at something like a lightweight keychain light or a headlamp. Probably would ask for minimum wage 100lm high although might be able to do a lot better these days. Runtime is like a low mode with a good strong run time.
Not sure how aggressive waterproofing would be needed. Obviously more is better but would the normal ip67 1 meter 30min be adequate? I would want to be comfortable swimming/snorkeling with it. Battery option isn't critical although I would err towards AA if you really pushed it.
Not sure how aggressive waterproofing would be needed. Obviously more is better but would the normal ip67 1 meter 30min be adequate? I would want to be comfortable swimming/snorkeling with it. Battery option isn't critical although I would err towards AA if you really pushed it.