Nitecore makes the NU25, it’s available on the Big River for under $40. I don’t own one. I have an NU20 which is great for carrying something quite small (it lives in my laptop bag). I also have an NU30 (discontinued and replaced with the NU32), which I use primarily for night shoots on the outdoor range.

Thanks. Checked it out. it is another example of the increase in illumination relative to weight that seems typical of lithium ion batteries.

As automakers turn to electric, I wonder what technological advances will increase lighting efficiency even further....

That's why, when considering a light, the first thing you should ask is, "Is that rating in normal lumens, or Chinese lumens?"

Similarly, when considering a generator, ask if it's rated in "normal watts or Chinese watts".

High end automakers (BMW, Audi) have been using LEP (laser excited phosphor) lights as opposed to LED for a while in some models.

There's probably a dozen or more flashlights using the technology so far.
Most of the single cell (18650 or 21700) LEP lights produced around 500 lumens, but the candela ranges from 200,000 to 1,700,000.
The current champ is the Weltool W4

https://www.weltool.com/page137?product_id=148

And Acebeam recently announced a 8x18650 light. 1400 lumens, 3,970,000 candela

https://acebeam.com/white-laser-lights-w50

Here you go: https://www.litesmith.com/nitecore-nu25-triple-output-usb-rechargeable-headlamp/

Or https://www.trailspace.com/gear/nitecore/nu25/

Those LEP lights are definitely the kings of throw! I am thinking of picking up a JETBeam LEP, just not sure how useful it would be for day to day stuff.

I have 1/2 dozen or so NU25s. I use them for backpacking, car kits, jogging, BOBs, etc. They weigh less than an ounce, last forever, are incredible bright, and recharge quickly from a USB power pack.