Blacking out inside of growbox

Hey guys,

So I just finished the structure of my growbox (it's about 2x2x4) and I've been thinking of ways to block light leaks. An idea came to me yesterday of stapling a black garbage bag to a white one so as to keep a reflective white surface facing my plant while the black surface faces toward the outside. What do you guys think of this idea? Also, I'm using a 150w HPS and although this isn't super powerful do you guys think this will be enough to melt the plastic garbage bags? Any feedback would be great!!

yeah you'll get a weird smell from the bags i tried that and they ended up being a problem about a week down the road

mylar is the best best man... i used potatoe chip bags and there was 0 light which came out

go to home depot get a product called great stuff and soem sand paper --
its foam insulation in a can, it wil fill all crevises and oyu can sand it to the corner.


What I personally did is sheetrock spackle and fusion film.