Hardwired to an ignition hot, on when the car is on, open fuse in the fuse panel. I also have an over-ride switch mounted next to the hood release that I can turn them off as needed.
http://www.tmart.com/24-LED-Strip-Car-Lights-Flexible-Grill-Light-Blue-12V_p84769.html
***I love tmart.com I have used them to convert both cars to all LED inside and out for a lot less than retail***
These are the lights I used under the dash, and under the rear seat.
For the cup holders, I used a Blue LED (12v with 100ohm resister wired in series) I got those from FRY's electronics for $3.99.