Those missing lights on the front corners of that railcar, are NOT marker lights. They are "Classification lights". "Marker lights" would be on the rear corners of the car. (Red)
Classification lights would indicate (White) that the car was running as an extra train, not on the timetable, or (Green) that it was a second section of a train on the timetable. They would not be on, if it was in normal service as a train on the timetable.
This is of course, by North American operating rules
I offer this information, just in case anyone cares...
Fred Mills