What's the ideal sized grow space for one 1000 watt HPS?

The literature from the light company says 8'x8' is the primary light growing footprint with 12'x12' giving off "secondary light". I was thinking of a 6'x6' tent. What is your opinion? TY.

only issue I would see is heat...

I think my 4x4 tent is the perfect size for a 1000 watt HPS. I couldn't see going much bigger than 4x4. I could see doing a 5x5 if you got one of tho larger hoods, like a raptor xxxl

4x4 is best. 5x5 would give you room to get in side too if you needed too.

in a 6x6 full the outside edges will not get enough light to produce respectable buds or branches.

now 2 600w would fill a 6x6 if you have the space. or put 2 1k in it for more
concentration, penetration and very respectable buds.