Greeblings. Not ghosts, greeblings.
There are a couple of posts on Red-dit and Thre-eads, but I won’t link to those; here’s another description, although it’s wrong. It attributes Greebles to Red-dit, but the term predates not only that site, but the web entirely. I first heard about greeblings in 1983.
sp3tr4l@lemmy.zip 4 days ago
Hahah!
Its usually things like dustmotes illuminated in a light band we can’t see, or reflections off of metal or refractions through glass that we just see as maybe a bright spot, but they may see as … basically psychadelic colors.
If you ever have a crystal or window where light shines through at the right angle , such that it makes a spectrum along the wall or floor…
… basically they see some kind of ‘super’ blue that extends beyond where our vision cuts off. The prism’s rainbow pattern keeps going, we just can’t see it.
Also, blacklights are probably very weird for them.