I am a new grower building my first grow cabinet. It is a 3'x4' cabinet that is 6' high. I have begun lining it with aluminum foil because I read that is a good cheap alternative to mylar. Now I am finding conflicting info on aluminum, saying it creates "hotspots." I dont understand how if aluminum is LESS reflective than mylar it could somehow concentrate the light MORE than mylar. Can anyone clarify who has used aluminum foil, that detail has been lacking in everything else I've read? I am trying to include a picture to show how I am doing it I should add that I am using 600w HID lighting, definitely using HPS, haven't decided if I'll do MH vegging or not, my ballast supports both.