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The big lumen number on a headlamp is a burst figure the light cannot sustain. What matters is the output it holds, and the runtime graph shows it — the FL1 runtime figure alone does not.
Pole failures are almost always the lock slipping under load, which happens precisely when you are leaning on them hardest.
The membrane almost never fails. What fails is the treatment on the outer fabric, and once that goes the jacket stops breathing and your own sweat condenses inside it.
The words are used interchangeably in shops and they mean different things. A filter stops bacteria and protozoa; viruses go through it. Where that matters depends on geography.
