Newbie making first grow box

I decided it would be more cost efficient to grow my marijuana instead of buying it, so I am in the process of making a grow box. What I really need to know is what components does it need. I already have: A nice big cabinet set aside, a couple of light-bulbs that project sunlight, and a couple compact computer fans. What else will I need? Also I read about some people painting the inside of their grow boxes white? Any help would be greatly appreciated :leaf:
 
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