Strobe Light: There have been reports that when
people see an
apparition or a shadow person
etc, they claim that it moves extremely fast down a hallway or into a
room etc. Some investigators theorize that if
you set up a strobe light were there has been activity of an apparition
or shadow person, then in theory if the apparition or shadow person
enters into the room, hallway etc where the strobe light is located
then it may slow down the movement of the apparition or shadow person
so then you will be able to capture it on either photographs or video.