Just looking around and seen this, let me give you a little advise as i myself have been growing in a wardrobe for the last 2 years,
A pc fan is great but only for extracting hot air, get a fan and mark on the side or back of youre wardrobe up high where the hot air will be and cut out a hole just smaller than the fan and screw the fan onto the wardrobe faceing outward to blow hot air out, i was worried about doing this and having light escape but it has improved my growing conditions alot and now i dont even really need to leave the doors open, get a small desk fan inside for moving air around or another 1-2 pc fans at least,
on the point where you talk about the heat from the cfl, ive used both 250watt cfl and 250w hps and theres no difference in heat, the hps will make youre buds dense and yield a little more but dont worry about it being too hot you wont see a difference, get the pc fan pulling hot air out and it will help youre plants alot