My advice is to rule out man-made causes first, and then confirm with other evidence (EVP, video camera, EMF meter).
You may also find this article from Southwest Ghost Hunters helpful.
There is no evidence to suggest that red orbs are harmful or more negative than white orbs.
The color difference may simply be a reflection of the spirit's energy at the time of his death—or the color may be caused by the shape/frequency of of the orb (wavelength theory #1).
Meanwhile, other subscribers want to know why certain orbs have different colors (red, blue), and if there is a meaning to these colors. An orb is a solid or transparent "ball" of energy or light.
Some parapsychologists believe that orbs are spirits, or lingering energy from deceased entities. Orbs can appear in many different shapes and colors, with white orbs being the most common.
If you see orbs at a particular location (in person), and you can confirm this with EVP (or other evidence), then there's a good chance that what you're seeing on film could be paranormal.Here are a few examples of orb photographs: Not all "orbs" that appear in photographs are paranormal.In my experience, many of the orbs that appear in photographs can be explained by the flash reflecting off dust, particles, insects, or moisture droplets in the air in front of the camera.Other shadow chasers claim that red is a color associated with an energy that seems to be on guard duty (often watching over a last outpost, or a loved one who has died).Dee asked whether a red orb should be considered negative or harmful.