Oh man a lot of mean suggestions here. I think its a great idea and an easy one at that. First off you buy LED grow lights, write that down. They are perfect, no heat no electrical use, you are in the clear with these. As for smell start burning lots of incense and aerosol air fresheners. Personally I use glade plug in air fresheners I run them on timers around more grow area, people constantly comment how much they like the smell of my stuff. If you live on the bottom floor in the house I'd try and break through the floor and see if you can get to the foundation then grow in that dirt but it is DESTRUCTION so make sure the people you live with wouldn't mind you renovating your room. And if you can't get your hands on a LED, then cut a good portion of your ceiling out let mother natures sun shine in and you'll be in the money. Tell the newbie narcs you live with you're installing a sky light.