Just my thought, Is the WH being used for tribunals? holding them at night,, as many people are home and would not notice activity as easily as you would in daylight hours. As for the clothing, perhaps they are witness's being brought in, those that they rescued and issued clothing to while they are being kept safe. That could explain emergency lights, by police or the agency transporting witnesses. Perhaps ambulance and medics incase something were to happen to a witness during testimony, also don't forget someone has posted that those rescued from the dumbs have never been exposed to light, so the darkness is there to help them. There are so many possibilites it is mind bogging.