You're pretty screwed with that setup. Normal bulbs don't do anything. At least you're going to need a couple (more like 4 - 10) 24" flororescents, which will do the trick. Not the best, but not the worst. A regular bulb (incadescent.. I don't care how much it says it's for "growing plants") is totally worthless. If you don't believe me, just keep your eyes on the plant, and watch it die from lack of light in a few days.

The smell from plants is powerful, and will be noticed. You cannot get around this one, unless you are crazy stealth ninja about it. It means you can do it, provided you grow in a room that vents somewhere your cousin NEVER goes to, or you have a pretty rad filter setup, and is still vented somewhere your cousin NEVER goes to.

Much better for you, in my opinion, would be to plant it somewhere that no one goes to outside, and then follow the advice on outdoor growing.

Seriously man... with your current setup, the plant is a corpse in a manner of days, and if you buy different lights, you're a corpse when your brother finds out because of the smell ( I wont even get into the fact that hiding a six foot tall plant is slightly difficult).