I have a 9" streetglow mini neon under each side of my console, the driver side is held up with zipties.. the passenger was a little harder to do, being the small space, but I managed to zip tie one side and use electrical tape on the other. I know that sounds cheap, but you can't see these unless you get on yer knees and look, the light lights up the entire floorboard and gives a slight haze all the way up to the lock and window swtiches, its bright, but not intrusive.. the biggest problem with this is that you will constantly think something with a blue light under it is parked next to you until you get used to the reflection in the window

as far as a switch, these come default with a cigarette lighter plug on the end.. I cut this off and wired them to a switch in my kleenex area.
a kit with 2 9" tubes and a transformer costs about $50 from streetglow, but I got a set of 9s and a set of 6s for $82, so I'm guestimating perhaps alittle less than that, I would definatley recommend the 9s for the front and the back if you wanted to do that, the 6s just aren't bright enough, I have 1 picture of these lights on my photopoint, but unfortunatley my camera isn't good at taking dark pictures
sorry guys, HUGE post.. hope I covered everything