Fairy Lights

Fairy Lights hang only on a solid wall face. Click a floor or a ceiling and they look for a wall in the direction you are facing; with no wall there, nothing is placed. Pieces next to each other join into one sagging string, and if the wall block is removed the lights come off.

The light is steady and has no off state, so the string always counts as lighting for the setup rating. You can walk through it.