in uk (maybe you'll be fine for a summer grow)
to the wooden studs cant see on foto(studs run vertically...)
would that not be a fire hazzard?(only if you set it on fire)
either side of the area in thi pics is about a 6 inch cavity that goes up to the loft was going to fit a carbon filter (good plan)
thinking maybe cfl not sure how many, dont think i would be able to get hps in there tho or could i ? what way would get the highest yield, of course i live at home! who doesnt!!!!!!(cfl's would work, you would need several) you can definitely fit an HID in there if you want. t5's are always an option...and sorry, I was too high...I meant I hope you don't live with your 'rents)
you are welcome
Keep us updated and good luck.