There are two kinds of Energy Orbs: Spirit Orbs and Energy Orbs emitted from a person here on Earth's own Chakras.
The photos displaying Orbs are directly out of the person's present own Chakras as emissions of positive feelings, coming out much like a bubble comes out of soap suds. They lift up and are there for a time and then they dissolve. They are readily picked up on photos though. When they are in flight or moving around, these Orbs can be noticed as a streak, yet they are still emitted from a person's own Chakra System, directly out of the Heart Chakra or the Mind Chakras specifically. There are times when there maybe some "reticence energy" and then that would be emitted directly from the person's Third Chakra, their Solar Plexus Chakra ---you know that "gut feeling" energy? The Solar Plexus Chakra has more of an instinctive feeling which includes reticence feelings, gut instincts, and more decision-making emotions.
Each Chakra has a reason for being, and an energy associated with it, especially in the moods area, or emotional area. (See Chakras).
The second reason why Orbs appear: They are usually the much larger Orbs, and generally speaking these larger Orbs are from Spirits Chakras by Spirits in the photo area. As their Chakras also emit Energy Orbs from their Chakras, too, yet as they are Spirits, their Energy is much higher a frequency. Being that they are already on a higher bandwidth of frequency, the Spirits' Orbs would therefore be much larger and usually stronger looking.
Small Orb Light Flashes: There are indeed colors that do radiate outwards from a Spirit. Each Color represents the color of the Chakra, and each Chakra can emit a flash of color directly out of the very center of it's whirling vortex. It is a strong energy, and can display this quickly which is why it flashes. So the color range is this:
White: That would signify that the nearby Spirit is strongly approving whatever it is you are doing.
Lavender: Also a part of the 7th Chakra and is of a gentler higher range, yet more of the Yin Maternal feeling coming out.
Bright Light Blue: Throat Chakra: Someone in the Spirit Realm said something nice about you nearby you, and/or are thinking of saying something very sweet about whatever it is you are doing. They also could be showing you this display deliberately so that you would notice their approval of what you are doing or saying.
Green: Not always is this a commonly viewed color displayed as a pin-point of light. Usually green it is much bigger and wavier rather than an intense dot or flash of a pinpoint of light, and So Is Yellow and Orange, too.
Red: Now this is where someone can actually see an intense bright brilliant red dot of light visually seen quickly. Anger is what is triggering this visual display and it comes out quickly and simply as a bright red dot seen. If one sees this suddenly shown them and NOTHING is going on inside your own mind with thoughts or engaged in a conversation with someone else, to trigger a reaction like this of a Spirit, then the best recourse is to quickly ask the Lord to intervene and come to your aid, since there would be a negative-type Spirit Entity close by. Anything to do with Red is something of a concern. Red eyes displayed, red lines, ---all those are important to notice and to not just wonder about casually. The color red ANYTHING should be called upon the Lord for aid.
Now after typing that I do want to mention the following:
When Father God smiles at someone, His Eyes actually radiate a quick bright blue colored pin-point of light you can see. He breaks through that Veil and we are for that fleeting moment able to visually see this bright blue dot flash of light and can feel the warmth of His smile which feels like we've been warmed with what I describe as a Hug Energy. We are not physically squeezed of course, but it feels like how we feel when we have been cuddled and lovingly hugged by someone whom we love and are loved by--that type of feeling.