https://www.amazon.com/Spider-Farmer-Dimmable-MeanWell-Spectrum/dp/B07TS82HWB
shows 28"x28" footprint for 1 light.
@18" it's a 500 umol/s blanket coverge, which is great for a mature vege'ing plant. 2 in a 3x3 might be too much. ~500 would be the minimum you want for bloom, for reference.
12" with 2 in a 3x3 could work -- as long as you don't see fewer trichomes at top as it deveolops... should occur top-down. if not, it's a sign they are evaporating due to heat or too many photons of energy. if you ever see buds below more rip than above, it's very likely your lights are too close regardless of other specs.
you're tent size isn't optimal for your footprint in vege, but it can work. you'll just have a hot spot in middle at 24-30" for vege. In bloom it'll be better due to a roughly ~1" strong footprint, but with overlap, you'll have a solid coverage in your tent at 12-16". it'll be weak at front and back, though (or any 2 sides.) line your equipment on one wall, and that takes care of it, lol. offcenter lights where plants are.
a rectangle shape is better for you. a 4x2 would kick ass with those lights in bloom, i bet. custom 48x30?
get a cheap lux meter for $10. it'll allow you to even out the coverage. if specs are accurate, the lux can even it out just as well as a PPFD meter. anyway, along with their par readings and 28x28 coverage, you can pick a height, then lux meter can help you even it out with spacing/positioning of lights.