Mood lighting. :p

Actually just ambient lighting, so you have a little glow to help you see around the inside of the car at night.

Nice, thanks. Had a hunch it was for that, wasn't really sure.

The red light is so the instrument cluster and other things can be seen at night. Move your hand from your lap to the stick shift and you'll see how the red light illuminates it. Different Nissan vehicles have different colored lights, Murano for instance has a white light.