Aluminum Foil vs. White Paint

The walls in my closet are white, but i put up full walls of aluminum foil (dull-side) for better reflection. should i have just stuck with the white walls? the closet is about 7' x 2'... 1 400watt MH light hanging 3 feet above plants.

i understand that using the shiny side of the foil might cause some hot spots in the lighting, but the dull side seems a safe bet, no?

yep, from what i read on here is that foil doesnt reflect much and it turns your setup into an oven. flat paint replects around 95 % and mylar that looks like foil but is not reflects close to the 100%.

mylar is very cheap now and days i just bought a roll of 36 inch by 25 feet for under 30 bucks. that was enough for by entire setup. ill be using flat white flat paint everywhere else i didnt cover with mylar. should be fine.

okay. good to know. thanks guys.