gg23 i have been growing in my attic for years .With the temp rising now with summer coming i would advise that you have lights on during the night when it is cooler outside and lights on during the day in winter.the attic is a great place to grow if you are able to get up and down easily enough and are growing soil and not hydro as lugging all that water up there for your res would get tedius beleave me ask mobay he whent back to soil and make sure all wiring is correct and all fire hazards are made safe, always use plastic sheeting or trays under your pots as you dont want water ruining your ceilings,another thing is are you building a box up there or are you just going to grow in a corner.My advice is if your attic is floored grow in the middle of ithe attic as the ventilatoin is easier in the open i have a box for veg in the corner and i flower in the middle of the attic and my veg box temps and ventilatoin can be hard work sometimes but the flowering goes well in the open space.hope this helps you bro.the postman.