a month in, you like some feedback on fire hazards and going into a 12/12

Ok I have a closet going and want to make a perpetual harvest. Been adding a few plants and more lights every week. 10 plants now and the oldest 4 might be getting ready to go into flower. They are only about half a foot tall but they seem to be growing faster lately. I have a closet with 2 doors that open in the middle, I have not been able to prevent 100% light leak. I'm thinking of putting a black cloth in there but I'm wondering if it is a fire hazard. The closet has two areas, a top area for hanging clothes and a bottom are that had 3 draws which I took out. I want to be able to run 24/0 on the bottom and 12/12 on top. The problem is light proofing the door and the sections from each other. There is a space about an inch from where the divider which spits the room misses the door.

I really need to fix the light leak for 12/12. Can I get a black cloth and a staple gun and go to town? Or is this a huge fire risk?

What are you temps and what lights? That will answer your fire hazard question...

Use insulated or blocker curtains. You can get them at lowest or Walmart, black on one side, white on other.

Assuming you're using CFLs there's probably not much risk of fire. Obviously, don't have any sort of cloth directly touching the bulbs. If you can't keep the light out of the 12/12 chamber you probably need to scrap the idea of having multiple chambers. I've seen people have problems with hermies and plants that barely produce due to light leaks.