Two lamps that I stole from an enemy outpost, once placed, have connected to a non-existant power grid which is providing power. After reloading the save, they disconnected from the grid and stopped receiving power. However, they still provided light. The link provides a download link for a zip file containing the save file, the log file and two images (before and after the save reload).
https://drive.google.com/open?id=1lcYTrAhTt8QyaoFrRbFBMhzvWKR89COi
https://drive.google.com/open?id=1lcYTrAhTt8QyaoFrRbFBMhzvWKR89COi