Ghost Pictures: Alnwick Castle Ghost Pictures

We recently received these potential ghost pictures taken at Alnwick Castle of Harry Potter fame. We have never seen this type of green energy in waves before and are intrigued:

"Submitting two photos I took inside of a dungeon at the Alnwick Castle in the UK. This is the castle where Harry Potter was filmed. The castle is owned by one family and they live on the property, allowing tours of some areas during the day. This room is very small and the photo shows the classic bars across a slit in the wall, which is how the windows were made in dungeons back then. To the visible eye, I saw absolutely nothing unusual. I took two photographs with a digital camera and only later noticed these bizarre lights. There was no smoking on the property; the wind was not blowing."