Theory

orbs at night
Orbs
The theory of orbs is believed to be ghosts in the form of balls of light. They are life forms that travel in groups and are believed to be the human soul or life force of those that once inhabited a physical body here on earth. Frequently particles of dust are often mistaken for orbs in paranormal studies; however there is a clear distinction. If there are several balls on a photograph it is probably dust, orbs often are balls of light that are alone in places on the photograph. Orbs also are often not seen with the naked eye, this is why investigators of the paranormal use flash photography.

Will-o'-the-wisp / ball lightning/
wisp is also called will-o'-wisp, corpse candle, jack-o'-lantern, friar's lantern, gunderslislik, and wisp, is a Folklore depiction of ghostly light sometimes seen at night or twilight over bogs, swamps, and marshes. It resembles a flickering lamp and is sometimes said to recede if approached. Much folklore surrounds the phenomenon.
EOPS has yet to examine an occurrence of a wisp but we have few people saying they have seen a blue ball of light around Lake Eufaula around the hospital and Haunted Hallow by Belle Starr area (private area).Sleepy Hollow