6x8 flower room i have 5 600watt hps how many lights can i put in there

hey all seting up new flower room is 6ftwide 8ftlong 6ft in height i have 5 600watt hps and my friend has 3 600watt hps hes not using how many more lights can i fit in there?

U can put all of them as long as u can keep the temps down, that's the tricky part.
I have a similar size flower room and i use 2 1000hps and 1 400hps all in 8" reflectors and im running a portable ac, 2 intake fans (1 4" & 1 6") and 1 exhaust fan hooked up to a charcoal filter.