This is my first indoor grow. ive grown outdoors before but never indoor. I am growing in my attic that is 10ft wide, 4ft deep, and about 4ft high. my attic is a triangular structure. i have two 4ft T8 floros, one 2ft T8 floro, and one 27W cfl. i have two XXX skunk clones and 15 bagseed seedlings that just sprouted a few days ago. i have a couple fans for oscilating. I am going to buy a 250W hps for flowering but im a little worried on somethings. theres exposed ventilation and when i hang the light I am worried about the heat. how far should the light be from the ceiling? also i cannot cut hole in the walls for this is a rental house any ideas for makeshift ventilation riggs? HELP would be greatly appreciated! I'll have some pics coming soon.