There are many chinese manufacturers like Acebeam, Fenix, Imalent... that have even 60.000 lumen flashlights and most are IP rated for underwater use, 2-3m drops, so you could call them worklights. And they are made from aero-grade aluminum, not plastic like Makitas and Milwakees...
And I doubt that these Makita lights can sustain 10.000 lumens. That is probably the peak output for a minute or two, after which they step down due to heat. 10.000 lumens needs active cooling, and not plastic lol.
Acebeam has lights that can sustain over 10.000 lumens without step down, but they have heavy heatsinks and some have fans.
With the current LED tech the max sustainable output for lights that size is about 1500-2000 lumen, and probably much lower for plastics.