@Psilocubensis, you can't actually see the fans from the outside. There is about a 2cm gap from the outside wall to the inside wall and the air is pulled in and out from that space. I also have 5 holes drilled on both side for more ventilation. You would probably walk straight past it.
@Psilocubensis, Thanks dude. Yes just an old box i found in the attic. Its about 35x25x40 cm. No sound whatsoever. It has two PC fans blowing in and out. Everything runs off USB connections so i could put it in the car if i needed to. Its only 60 watts of light though but the conditions inside are perfect.