do I need a intake fan? 8'X4' tent

I'm planning on using a 8'X4' growing tent for flowering. I'll have 2 600 watt lights and 18 plants I was wondering if I have an exhaust fan will i need an intake fan or is a hole in the tent good enough. also is it possible my tent would collapse if i do not have an intake fan?

not unless you used an attic fan. LOL
Na man, you probably got the lights air cooled so you can get by with say an 240cfm or so with a passive intake, just be sure to screen it.
A women's nylon stocking works well. If your lights not air cooled, they should be.

i would say at least a 4 in inline fan for your intake. no your tent wont collapse w/o it. it has a metal structure inside it....

thanks guys!

I use a budbox tent xxl with 2x600w, my lights are aircooled and i have a 6 in extractor and run passive intakes. My temps are around 27 and i run my lights during the day, if you havent got air cooled hoods then your gonna need an intake fan.