Most people will tell you not to use aluminum as a reflector. But its better then no reflector I say. I used the foil tape and it works wonderfully, one layer if enough on your reflector or what not, it completely traps the light. You can buy a huge roll at walmart for 7 bucks tops. As for reflectors ive seen people use small tuppawear bins for singles and doubles. Or you can make one big one with a big bin. Thats what I have done, yet to actually grow anything with it yet tho. We'll see.