Anyone try making a grow box with styrofoam?

I'm new here but have been looking around on here. Currently in my first grow. just looking for all I can to help out. I got to thinking and wondring if you could build a growbox out of styrofoam? Not cheap styrofoam but heavy dutty commercial styrofoam? Seems like with it already white there would be no need for mylar/paint, and styrofoam allows oxygen to pass through it. It seems like heat issues wouldnt be as big of any issue, and it seems cheaper and a good alternative to a budget build. Anyones take on this?

all thats true but unless its super thick you could only run cfls bc a hps with hood might be to heavy for the styrofoam at the top. it would be cheap and easy to get into so if your not going for stealth go for it but double it up