what size fuse is that, and what is the current draw of the light bar...
30 amp fuse. Not 100% sure on what it is drawing, since the precise bar is no longer manufactures. It's a Diesel Power 54" curved purchased almost 3 years ago, 27k lumens. It was discontinued and seems they have since come out with the same bar, but it is now 28k lumens, 312W.
It has been functional for years and the entire wiring harness was specifically made for it as part of a kit of sorts.
I have had a share of fuses blow in my life, just never seen one appear that it caught on fire for a quick moment, to the point it destroyed the fuse box along with it. If it just happens every now and then, I'm cool with that!