hey man, just my .02 but.... i stick to the sayin "if you go cheap, you grow cheap as well" i would not use something like cardboard around anything electric when im spraying water, etc.... high times had a article in last months edition (i belive it was 06.2006) it talks about a kid making a "HPS" growbox with a 4ft. dresser and 2 computer fans...
do something like that, you can get a dresser at goodwill or something for like $30-$50 , gut it, glue the fronts on and set up a secured back door on hinges and "POOF" you've got a "stelth box"

but then again, thats just my 2 cents
ronjohn420 Reviewed by ronjohn420 on . A few easy questions Can I use thick cardboard boxes lined with tin foil for a grow box? I can only find CFL's in 2700K will these work for the Veg stage and the Flowering stage? Can 3 Plants be ok in a 2ft X 1ft 7in X 3ft 6in, Then 4 plants in a 2ft 7in X 2ft X 2ft 4in? With a 6in fan in the bottom corner and vent holes across the top so the heat rises out of the box? Rating: 5