I've seen mirror finish type mylar which looks very smooth and i've seen a bumpy type of mylar at my grow shop which looks like a bunch of rivets in the mylar. I did some reading and the bumpy mylar was supposed to diffuse light better and reduce heat spots. I'm on the verge of getting mylar but I don't really know which one would be best for a grow cab...does anyone have any info to pass on?
ive grown inside of a cardboard box, it really doesnt matter the difference unless your a picky person..., just look for which is best for your setup. amazon.com has some pretty good ones, i got mine for 80 bucks....