As the EC, I would do 2 circuits, 20 amp @ 240 volt. I did a lot of lighting as an EC back in the day, both interior and site lighting. A lot of design/ build, retrofit HPS to MH (no LED back then) . We even eliminated LPS site lighting.
Yoop has 9 fixtures, probably 3 rows of 3 ea., so a 5/4 split would not be bad, one row of 3 with the center of the next row, then the balance of 5.
I wonder IF he considered LED, or T-5 high bays??
There's a lot of LED retro going on here, and I'm amazed at the rapidly changing technology. I just started plan review today on some crazy 'arcade' in a mall, and it is 99% LED. A recent Apple retail store is 100% LED, with a gorgeous evenly lit ceiling in the whole retail area.