i guess its all in perceptions. i too agree that .2 lumens is more than adequate for very dark conditions.

i take each of my ultra low lights onto the deck in moonlight and compare them to what light a partial moon offers. if i can just make out the beam at 6 feet, then i think of it as the same brightness. my original Thrunite Ti fits that bill.

on the other hand, all my above-one-lumen lights can very easily over-power moonlight.

my eyes aren't that great, but i have no problem hiking with .04 lumens on a moonless night. on nights like that, 3 lumens is blinding.

again, please keep in mind i'm discussing the use in the wilds, not near any town.

on the other end of the spectrum: in the wilderness i find 60 lumens more than enough for seeing distant things at 50-plus yds, yet when i visit a city that's not enough. there i find i need at least 200 lumens for most chores.