Concealing Light Leak From Door Frame???

I've been googling but not finding much. Anyone have a preferably cheap method of concealing light leakage from the crack around the door frame to the closet? The closet is a built in thing, with brick wall and plastered walls, so the door is a proper door in a proper frame, no flimsy IKEA closet doors or walls that I could manipulate.
Any good ideas?
Once thats done, I just built myself a fully vented and functioning room that can take 7 10 liter buckets under 750 watts...shit thats a lot of weed I'll be harvesting end of april lol...I can hardly believe I succeeded :S3:

i usually use duct tape to cover cracks in the frames, if you are looking to make it light proof in between the door and frame i would use weather striping, this is like a thin strip of foam you put around the frame were the door will be meeting with it

sticky back weatherstrip from home depot

i always use black and white and duct tape

weatherstrip, huh? I love you guys :S5: