I've been thinking about this since yesterday and I cam up with a few ideas.
I remembered another way this small lights phenomenon occurs to me (in fact it's this way it's the strongest, I wonder why I didn't remember it yesterday). When I get sick and my body won't keep up it's latest meal, or even want to get rid of an non-existant one, I get so constricted in the process that I often get on the point of having strong vertigo, my mind still being operational but my body not keeping up well. On those occasions I can see those lights really clearly.
Regarding the 4Th density bleedtrough and ethereal significance, this made me think about it in that way: I don't know how "ethereal body" relates in the density system but if ethereal body is factual, it may be also related to the glowing coat of awareness described here:
Castaneda further explains that infants are born with a glowing coat of awareness and that this is what the predator eats, to the point where only a narrow fringe is left. This narrow fringe is sufficient to keep man alive. This narrow fringe is man's self-reflection, where man is irremediably caught.
in the glossary
This "ethereal body" I am seeing is indeed a narrow layer of some blueish thing that I would describe as the last remaining flame one can see when a flame on a candle or a piece of wood is dying and mostly gone. If this is indeed what remains of the "coat of awareness" and it's what the predator feeds on, I suppose it would be located at the 4Th density level. I must add that I can see that blueish thing on about anything if I proceed the same way I do when I see it on my own body. It could be a sign that it's an optical illusion, but it could also be a sign that everything has an "ethereal body", or a 4Th density image or extension to it. I don't know.
All of this leads me here: if the two phenomenons are related, they may be a 4Th density bleedtrough we are able to see more easily those days.
Regarding the screen making them easy to spot, I thought about something the C's said regarding strobe lights being a psychic opener, it was followed by a list of strobe light we could find around in our environment, one of them being TV and computer screens. I believe at that time we were still using old style computer and TV screens, but modern flat screen could also be strobe lights, although I am not sure. If I am correct, the strobe effect of the screen would open the mind and make them easier to spot.
Now for the word "Image", it's the first word that came to my mind when I said "it could also be a sign that everything has an "ethereal body", or a 4Th density image or extension to it" but instead I wrote "extension", and came back to it and added "image" a few seconds later. Maybe it could be related to the 4Th density "image" of our bodies linking to our 3rd density bodies as Laura suggests in the transcript quoted by Legolas, or the other way around, 3rd to 4Th density, or both at the same time.
Something else also came to my mind. I like to play around with words and I noticed that "Image" could naturally break down in my mind as "I" and "mage", Mage is the french word for Magus, or that's what the translation from google is. For me the "Mage" is the STO pendant of the STS sorcerer, one who knows the hidden rules of the Universe and uses them for greater good when nothing else is available. My typical related character would be Gandalf for example. I don't know if I am going completely insane here, but I remember reading Laura speaking about Green Language, so it may be worth being mentioned anyway. Added to it the "deep fibrous DNA linkage" that would allow one to become such a "Mage". OK, now I feel completely crazy
Playing with words seems to have dangerous side effects on me
Anyway, the seeing of this small lights seem related to me with the fact that the mind can come be less grounded into the body, or something along those lines.
For what it's worth.