my attic is just like that. its about the size of the whole house sept the hatch to the attic is in my parents room. i found a 5ft by 5ft corner sealed off from the restof the attic. theres 3 big holes in the wall leading out side that were somthing for design when the house was made i put it in there. they stay in about 80 digrees in the day and 75 at night. i have 2 40watt florusent lights and mine are growing pretty fine. wut i did for power was i ran a cord from the lights under the fiber glass drilled a hole in my attic inbetween walls ranthe cord down and poked a lil hole in my room wall under my bed ran the cord under my carpet and pluged it in behind my computer in a taglement of wires. the set up is quite perfect. im gona by a nice like in 2 weeks after i transplant them. im going away for 4 days i was wondering if they would last with out me watering them but if not im gona have my friends water them.