I grew two very healthy plants with 6500k cfl's. That's what you veg with the ones I bought were made by GE and can be found at any walmart. I would use as many as you can fit in for max lumens. When they flower you will switch all bulbs to 2700k for red spectrum flower. I would not mix bulbs. I used 3 cpu fans to keep temps under 80f , they worked well. You can use dryer duct for the intake/ outtake but you have to have allot of bends to keep it light tight. I had my box in a closet in a blacked out room so it had 3 fail safes, the box, the closet door, the windows blacked out and the bedroom door. If I was growing in just a closet I would buy a powerful tower fan instead of cpu fans. If you can't cut holes in your wall or your closet door , you should make a faux wall. Like just a big piece of wood or hang up blankets over your closet door and vent under the blankets. it's gonna look sloppy but fuck it.