I have a box for seedlings and clones, its 2x4x2 (w x l x h). I'm wondering if I could get away with 8 100 watt cfls, or if a 5 light would be better for me. Also, would it need to be ventilated? I've heard cfls can be pretty cool, but I just want to make sure....the last thing I want is an explosion to cause some unwanted attention..What's a cheap way to make a fixture? They stock the bulbs most places...but no one has a fixture. Anything I can just slap together and voila!?