This STOP WORK sign, possibly related to the LED sign installation, was posted on one of the entrance doors to the church.
According to an LNP article dated July 25, 2016, Columbia Borough Council denied the church permission to install an LED sign:
Council denied a proposed LED-lighted sign at St. Paul’s Episcopal Church, 340 Locust St. Glenn Shaeffer, Historic Architectural Review Board chairman, asked that council create an amendment not allowing this type of sign in the future.
“There are no other signs like this in the historic district and allowing it would open the door for others and have an impact on the historic nature of the district,” Shaeffer said. “The historic district should not look like the Las Vegas strip.”
Council members Kelly Murphy and Cle Berntheizel removed themselves from the vote because they are members of the church.
This sturdy metal frame was installed some time before October 2, 2017, when this photo was taken.
HERE is a video showing the manufacture and operation of various LED signs from ADvantageLED Signs.