One of the leading theories concerning what orbs are and the one that I lean towards the most is that they are not the spirit at all. The orb is the energy being transferred from a source (i.e. powerlines, heat energy, batteries, people, etc) to the spirit so they can manifest. This may not even be a conscious thing the spirit is doing, just a natural way they get their energy. This would explain why the orbs are round balls. According to the laws of Physics energy being transferring like that would assume is natural shape of a sphere. This theory can also be tied into the EMF readings we get during spirit activity.

Hm. That is an interesting theory indeed. But then I must ask: If the orb is actual energy such as heat or electricity, shouldn’t we be able to measure it with standard electrical equipment? That no-one has apparently done this makes me think the “energy” involved is more of the “chi” variety than the electrical variety.