As mentioned earlier, if that is tin foil you should remove it. Tin foil will cause hot spots and burnin of your plants. If you dont have a local hydro shop, order you some peel and stick reflective mylar. Now if you cant get the mylar go to your local Lowe's or Home Depot and buy some flat white paint and paint your grow box with that, because flat white paint is the next best thing to mylar, no2 with all that said your grow box itself is covered, now onto the plants. My first 2 grows were with cfls and cfls/led combo, without some form of training you will have an uneven canopy(which if you didnt know, with cfl grows, is a very very bad thing). So what i recommend you do one of 2 things: scrog, or LST your plants. Being your first grow im sure you dont know what either of those training methods are, so take some time and research them, doing one of these will take full advantage of the entire space you have while maximizing your yield.
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