You just reminded me of my two brightest flashlights. I think my father picked these up before I was even born. You don't see many flashlights that get installed
onto the battery, rather than the other way around, anymore.
They look like this, but older and cooler. Will try to pick up a battery and get a photo this week:
View attachment 834968
I remember those!
I'll bet you could get an LED replacement "bulb" for it and it would
really shine!
Probably the best thing about LEDs, IM(nsh)O, is that you actually have a choice now of brightness vs battery life. That old flashlight came with one choice of bulb - bright for its day though not now, and the massive size of the battery gave it a nice lifespan. Today, you could get a replacement LED that has the same luminosity, and the battery would last five times longer, or you could get five times the luminosity at the same battery life.
I've taken advantage of this in my house as well, especially since I'm probably overly fond of stained glass lampshades - which tend to block quite a bit of light
as originally specified, you could only a 60W bulb in each of the two receptacles behind these lights, because of the heat given off by the incandescent bulbs.
Now, I have "100W equivalent" LEDs in there which are
way brighter and the stained glass doesn't get nearly as warm (bonus in summer!).
With the extra brightness I get a lot of reflected white light off of the ceiling (almost no shadows) plus nice looking shade as well.
Similarly we have a big 6 "candelabra" bulb light over the dining table that originally came with
40W bulbs (miserably dark!) and I found some candelabra/standard bulb base converters and had 60W LEDs for a long time, but now you can get candelabra LEDs in 100W equivalent and it's just glorious - not bright, per se, just the right amount of light and color.