To help Illuminate the subject...oh geez, sorry...couldn't resist...
The problem with "specs", is most companies CHEAT!!! Just as with headlights, LUMENS is only a BRAG-point, if the focus and distribution isn't top-notch.
I've had many discussions/arguments from the "younger cheaper" kids about off-road CHINESE LED lights being "so cheap" off Amazon. They buy their $75 light bar and laugh at my Baja Designs for a bunch more....until I flip the switch, and continue to do so years later.
So, the TOP brands (like Streamlight, Fenix, etc.) don't play the numbers game as much. They're quality products.
That said....the junkie throw-away C-cells from Costco are pretty stupid bright...LOL. So forget everything I just said.