Lol, my mom did this back when she grew in the 80s with stolen street lamp lights... Ya it works, but be careful and remember that you cant breath hella CO2 so if you really cant afford an inline fan and some ducting running near the window then just apply in moderation.
I've always grown outdoors or indoors with 600watt HPS and i was curios, Do you get decent yields and quality bud from just white light? The only reason i ask is because i have a friend who's trying to do just that and i keep telling him he's dumb, but am i being to hasty? Just to show you what...