building my grow room

ok im planning on constructing my grow room tomorrow. Here is my plan feel free to correct me or give me some advice.

Grow room will be my closet. it is about 3 foot by two painted flat white.
Lights: going to use cfls prob 4 45 watt evenly spaced on the top prob mount them to a 1x6 with a cable or rope hanging it to adjust the distance easy keeping the lights about 6 inchs high. 2 on two sides one about 18 to 24 inchs the other prob 36 inches as they grow
plants going to put them in about 3 gallon pots with ocean forest and happy frog 50/50 prob going to have four plants in it as anymore they would be completely on top of each other
Since the door is like shutters im thinking using a dark sheet to keep the light from keeping me awake or keeping the door on and at night putting the sheet over the door so during the day I can remove it and the slats will allow venation
Since there is a top shelf I figure it will be a good place for a small fan to allow venation.
My plan is to mount a humidity and temperature gauge on the side probably the back half way up. Then a small dehumidifier somewhere

I don't see the need to line the walls with foil or anything as their white and I have 8 lights.

My goals are to keep it simple but get a good harvest and learn as I go so when we get in a house and I have room for a serious grow Ill already have some experience and make going full hydroponic system easier

So am I missing something or doing something wrong, what you guys think

Probably won't need a dehumidifier, especially in the Winter if you life where you have to heat your home.
White paint is fine for reflective walls.
I would put the lamps as close as possible, more like a foot or less. I'm sure others may feel differently but the main thing is heat. Use your hand to feel what the plants feel or use a thermometer and keep the canopy temp under 80ºF.

I should have worded it diff. I figured my light measurements vertically with them being six inchs or so off each side with the top lights staying six inchs above the plants