led ribbon

I had some fun in the early morning hours with the strip lighting. This subject startrd in John's thread I also made a mini under counter light or whatever. You can't do enough with craft sticks! :D

I have several sections of LED ribbon that I need to power. I have the appropriate transformer and dimmer, but my question is does it matter if I run the separate Ribbons in series or parallel? The sections of ribbons are at different locations and it would be advantageous to have them running...