>>1138474>repairing stuff / checking holes5-10 lumens max, more would just blind you, same goes for stuff like night fishing
>>camping / general comfort lighting same same, you rarely need more than your low light setting, still nice to have a brighter light in the 100-200 lumen setting, make sure it has god peripheral illumination. Also, redlight with low 2 lumen output is really handy, you'll end up doing most small stuff with it, saving batts and keeping your night vision.
Also if you need general lighting, something like a LUCI lantern is a good option, in case you play cards with your buddies or something.
>>night hiking / cave exploringThis you usually won't do with a basic headlamp. battery size is the main thing. ther is specialized products for night trail running, For your average night fishing trip a normal headlamp is good enough, but if you decide for whatever reason you need to run at night with high speed over rough terrain you might need a specialized model. Again, Lumen is not the main concern, you don't need much illumination beyond 70m, but you need peripheral illumination.
Cave exploring is even worse, there is professional products for miners and such that come with large akku packs, you really shouldn't do this with your little pocket headlamp.
>>Self defense / blinding threatsseriously? no.
In general, what you need for camping chores most is a small headlamp, AAA bats, IPV67 rating, red light, low lumen setting, ~100-200 lumens max, one handed control that works with gloves on. Also, light, small, and made from plastic with comfortable headband. Aluminium can be a troublesome because it is an excellent thermic conductor, which means it is a bitch hot or cold. Also, you often sleep with your headlamp around your neck or wear it for hours on time. Less is more. Thats for normal camping applications.