Ok guys i am trying to settle a friendly wager. there are three schools of thought here... 1) Me: Mylar is best for reflective properties and coverage in the grow room. 2) my buddies idea is to line the grow room with as many mirrors that can be reasonable be fit in the grow room with some coverage lost but due to the perfect reflectivity of the mirror there will still be adequate reflective properties to grow. 3) another guy says to line the walls with aluminum foil (shiny side out) and that it would work fine. anyone care to settle this for us? Thanks ya'll.