From Starbounder - Starbound Wiki
Power Sign is a wireable object found in the Erchius Facility mission.
It can be connected to wires to display either on or off when triggered by a switch.
|A red glowing sign.
|A simplistic electronic
|Sssome sort of sssign.
|Observant. This low power sign has two states.
|A very informal sign.
|A soft glowing sign.
|A straight to the point kind o' sign. I can appreciate that.