The planes on the taxiway have white takeoff/landing lights. It sounds like the second in the queue didn't turn theirs on until just before the incident, but if

The planes on the taxiway have white takeoff/landing lights. It sounds like the second in the queue didn't turn theirs on until just before the incident, but if any of the others had theirs on prior, it could contribute to misidentifying the taxiway. I think it's common to have the lights on while taxiing and turning them off at rest.