I seriously doubt they have a clue what they've got, but it'd possible for the ratios to be off since different LEDs put out different amounts of light per watt. better LEDs will use less power to obtain the same lumens. watts is just power suckage, lumens is the light output.
I still say they are full of it.
on the subject of lightbars, I went in with a couple more friends to buy my buddy a big honkin' light bar for his big honkin' f250. we went with a lower lumen claim (70k) but with a better lens claim (4d). still cheap as hell though (60 bucks and comes with wire harness). oh, and a couple small LED pods for bed/backup lights. I'm infinitely curious as to how the main bar would compare to the mini-sun you got.
https://www.ebay.com/itm/4D-Curved-52inch-700W-LED-Work-Light-Bar-Combo-Offroad-Truck-SUV-4WD-Jeep-Wiring/192318049137