I wanted a gooseneck lamp for over the mirror. I 3D printed the shade and the little disk thing that attaches it to the wall. Then I had to encase the wire in something with that curved shape. I kept asking my husband, the wiring guru of our family, “do they make a hollow bendable electric wire that holds it shape?” He couldn’t think of one. Or he didn’t care. So my solution was this: I wrapped polymer clay around a thick string, bent it into shape, baked it, then removed the string. (I didn’t bake it around the wire because it was already attached to the switch). Then after it cooled, I removed the string and had a hole to run my wire through! Not totally perfect though - I had to cut it since the wire had a hard time getting through the extreme curve.