I'm trying to figure out how many lights I need in my basement. It's been a loooong time since I did lighting plans so I really don't know what will be good. My basement is just a basement. It's not really finished or anything. I was just going to use those 4' dual bulb fluorescent light fixtures but am trying to figure out how many I need. Anyone have any input or rule of thumb as to how many of those light fixtures per square foot.