Passive or Forced Intake?

I have a 4'9x4'9x4'9 tent with a 600watt light. I plan on using a 452 cfm exhaust fan. Was wondering if it would be better to use a passive or forced intake? I was gonna buy a 172 cfm fan for the intake but I don't want to waste the money if I don't need it. But whatever would be better is what I'm looking for. I also can't have any odor at all. I plan on using a carbon filter as well. Idk if the the intake could leak out odor

passive intake will work just fine.

i use passive intake for my 600w (320cfm outtake (cold country))

sso said:

i use passive intake for my 600w (320cfm outtake (cold country))

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Me too... .

You can easily get away with just a passive intake, so don't spend your money on the extra fan. I use a 4x4 tent with a Phresh Filter carbon filter and a 450CFM fan. I run the fan at 65% which is enough to create a negative pressure in the tent, thus sucking in air from my intake and it keeps the smell in. You shouldn't have problems with smell leaking if you get a good carbon filter and run the fan high enough to create a negative pressure in the tent.