Tent set up

I have a 2'x4'x5' tent and I wanted to grow four plants with a few mars 300s. How many do you think I will need for perfect coverage?
 
I use the mars 600s for veg, they each have around a 2.5 x 2.5 foot footprint not sure about the 300's i would use 2-3 600's in a space that big.
 
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