This rail supports a 10mm wide LED strip a couple MM off the surface below. Many can be printed and joined together with a freeform 3D printing gun such as a 3Doodler or with a soldering iron.
Print these oriented vertically for a flexible part that can withstand being stepped on. Make sure you have a solid raft and good adhesion. If possible, make sure your printer lifts the head clear of the pieces on each jump.
Note: If your printer vibrates a lot, you may be forced to print these flat instead of vertically.