I've got 2 kingbrite 240w quantum boards in a similar space. I use it for vegging usually but sometimes mother plants. I've never cranked the light in such a small space beyond 40% - 50%. It's a lot more light than you need in your space. It only makes sense if you're not intending to crank them and you're more concerned about consistent lighting all the way across the area. I had mine on a shelf unused so it was putting to use something I had already paid for.

Bspecs are heavy on blue light. It's a veg light and not intended for flower. Is this what you're looking for? It's a costly mistake if you're looking for flower lights.

No just veg. I have a 680e growers choice in flower tent.

Veg is 4x 120v 4k. Running full blast usually. I rarely dim on a 240h24

Ppf charts just show 120s way under a 288 by half at least I can't imagine 4 120s side by side match up to the same ppfd as 2x 288