The question that lay's deep in our minds regarding orbs is this.. What are these balls of transparent light? One belief on orbs is that their not a spirit at all, but instead, an orb is the energy being transferred from a source, such as, power lines, batteries, people, heat energy etc., to the spirit so they can manifest.
This may not 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 physics, energy being transferring like, would assume its natural shape of a sphere. This theory can also be tied into EMF (Elector Magnetic Field) readings we get during spirit activity.
Another belief is that the orb itself is a spirit that becomes visible in the form of an orb after drawing energy from some source, which no one knows for sure where the source comes from.
Regardless of which theory you believe, we can all come to a conclusion that energy is involved as well as spirits. The question is this.. Is the orb a spirit or just a ball of energy that helps manifest the spirit in a different form?
Below you will find two websites that you can refer to and decide for yourself which you choose to believe.