Hey Red, I am a newbie too but I have just finished reading 2 books and hundreds of posts on this site. I just love sucking in as much knowledge as possible. First off I am sure everyone will tell you not to use a regular light. They just dont produce enough lumens and they also create way too much heat. Buy a couple of 42W Compact Fluoro's they create about 2600 lumens each if you are going to use something cheap. They cost about $8 each. Now as far as ventilation I did the same thing with a box but I found that since the heat and light were trapped in the box the temp would go up to about 90. This is with an oscillating fan on them directly. I then put silver dollar sized holes (4 per side of box) and had a drop in temp of ~7 degrees to 83. I dont know if that is the answer you are looking for. I am just trying to help.