i personally have a lighthouse hydro tent, wanna say its a 3.5x3.5 footprint...no said chem smells at all...dont know how that would cause cancer...if that causes cancer so does EVERYTHING ELSE...hope you dont eat any trans fats...cause they cause cancer..or use laundry detergents or dish soaps...but personally love my tent...i have some pics of it in my grow log 'new dude grow' just some pinhole light leaks but i use a LED light so i feel the pink glow is more noticeable...all in all great tent got it for 60 bucks...good luck keep updated what you get with some pictures...always like seeing other peoples setups.