cob lighting

so was wonder if I should grow 3-4 plants in my 3x3x6 using a 600w LED VIVOSUN // or just grow one big plant and just growing with one I was going to use this light(photo below) Optic 1 XL COB LED Grow Light .. so what would you guys recommend ?

Like the tittle says Im trying to get as close to 1000ppfd with the vero COBs as possible in my 4x4 tent. Cost of the fixture is not a factor, I just want the best. Also, what type Vero is best for it (A/B/C)? Im doing a DIY fixture so if you could suggest the right number of COBs, type of Vero...