It should stay true to the game for sure or atleast be something ... with a fallout'ian interpretation.
There was sorts of nigh vision in use during world war 2, so certainly it's possible. I don't know how dependent on "microprocessors", which they didn't have til recently in fallout universe, modern "gear" is...
I was thinking of atleast 2 possible routes to go with it ... Either small specific areas or... if they wanted to make it more survivalist... Dark nights vs. days, somewhat dying light inspired, where in one you're the hunter... the other you get hunted, which could possibly be interesting with the new settlement thing.
Well, that's just daydreaming / random thoughts.
Personally I prefer that each have their disadvantages. Torch is light in every direction, but not very far. Flashlight, narrow, but further. Night vision is good but opens your for being blinded. Thermal can see through smoke, haze, but relatively short range and heavy/bulky. Rather than the battery thing, which I just find plain silly, since it must be the absolutely worst batteries ever.