foil is ok youll be fine, i see you just growing indoor not worrying about having a huge yield just a decent 1 is ok for the money you spend but its all up to you what your striving for nice set up but stems are kind of small you should get a fan in there you can get the 1 at walmart 10buck battery operated 2 D batteries, buy the dollar batts alkaline they last 4 - 5 days. anything to save on da lightbill. make sure fan not blowing your leaves also you can adjust the fan to different angle from its swivel. dont blow leaves just make sure they sway a little