But like half of the testimonies I've seen mention them being bright. I don't know if exaggeration is gonna cut it.
Obviously this thread is your first experience here, so some things to consider:
1.
Witness Testimony. This forum is full of threads about all kinds of events, sightings and claims based on what people claimed to have seen or witnessed. Very often, what people thought they saw, is incorrect when it can be checked against other evidence. There is a vast amount of research showing that what we see and what we remember seeing can be seriously flawed.
First is the original observation. People routinely misinterpret or misunderstand what they're seeing, particularly if it's something unusual or novel. How fast or far away something is also related to it's size, all of which can be difficult to determine, especially at night creating confusion about what is really happening. People may misinterpret a satellite in low Earth orbit as a drone a couple hundred meters over their head. Or think an aircraft is "hovering" because of the angle of observation.
In this case about Assuit, we must also consider
priming. This is a known issue. Many of the people at this event didn't just go there, they made a
pilgrimage to see a Marion apparition. They were primed to see something they considered miraculous. So, when a common pidgin gets illuminated by a common street light, they perceive it as a "luminous dove" and a sign from God.
After the original observation, flawed as it may be, we then have to deal with the memory of the observation. Again, there is a vast amount of research showing that human memory is not like a recording, but instead a recollection of sights, sounds, smells and feelings amalgamated into an assemblage, that is often very malleable, particularly over time. Besides time, outside influence can shape a person's memories. Thus, one could have a memory of seeing an illuminated bird while in a crowd of ecstatic, chanting like-minded pilgrims. Then as the other pilgrims share their experiences and some mention the birds were "glowing", one begins to remember it that way. The memory gets changed and modified.
All of this is to say, we have a reserved attitude towards witness testimony. It might be correct, it might not. We know it's subject to interpretation and misunderstanding and can be further convoluted in the witness' memories.
2.
Anecdotal Evidence. Similar to witness testimony, this is usually presented as a collection of testimonies that are often argued to add up to something. Each sighting of say, a glowing dove, is considered an anecdote. Even if the witness firmly believes they saw a miraculously glowing dove, we can't be sure what they really saw. It's an anecdote. Some then try to amalgamate various individual anecdotes into a cohesive narrative. Sometimes this can be correct, but sometimes there just anecdotes.
This is common in fields like UFOs or Bigfoot. Lots of people say they saw a UFO or Bigfoot, so there must be something to it. Not necessarily. It could just be a series of anecdotes, that while possibly sounding similar, may be unrelated or misinterpretations of various things.
3.
Empirical Evidence. This is the gold standard for interpreting claims. The nice thing here, is the research is a group effort. Some are good at looking stuff up and finding information. Some are experts in photography while others can find nearly any satellite in the sky. So, for example in the post above (#52),
@Giddierone used the powerful Sitrec tool to show that the moon, on that particular date would have appeared just as it does in the video. This raises the question or the timestamp on the camera. Which is correct? If the time on the camera is correct, it means that some sort of light created the exact same effect that the moon did, just an hour apart. So, the same effect happened twice? Or, did the user of the camera come from a different time zone and forget to adjust the camera? In which case they recorded the moon exactly the way the Sitrec tool predicted they would. The provenance of the video would be a good start. Where did it come from and who recorded it? Did that person travel to Assuit from another time zone?
In the end, the claims about what happened in Assuit 26 years ago come down to some questionable witness testimony and assorted anecdotes with some poor quality video. Despite the supposed regular occurrence of these sightings, most evidence presented today is the same time-stamped video that gets passed around. That video shows some lights, the moon, some birds and likely other mundane things. That video is often inter-cuts with other video of the crowds to create a narrative.
While there's not much to it, that means it's hard to completely debunk. Much of the main video seems to be the afore mentioned things like birds and the moon. Beyond that, it's anecdotes from 26 years ago. In addition, it's anecdotes about a religious experience, something very difficult to debunk.