>>40610523 (OP)The first known appearance of this symbol is the Grimoire Verum, where it's used as a symbol for invoking Lucifer.
The pattern is connected to the idea of invisible or reflected light - it's the pattern formed from rebounded light when a solar eclipse happens. It's also the pattern of light which your eye produces when it reflects light wavelengths to produce images to your brain.
Which leads to the obvious question: Who is Lucifer? What is Lucifer?
Lucifer is many, many things, but in occultism, Lucifer is Harpocrates in the Underworld, or the Dark Side of Horus - in Egyptian mythology / occultism, Horus was the god of the Morning Star, order, the day, the Nile river, and fertility - and Set was the Evening Star, chaos, the night, drought, and sterilization.
Lucifer represents Horus when Set, or Satan, is enthroned - he's the hidden sun below the horizon, in the underworld; the invisible source light which is reflected on the moon below the horizon. He's the Morning Star in the abyss. You could say he's the "black sun" which is invisible and below the horizon.
You're welcome, Hail Satan, Hail Lucifer
That's fundamental what Lucifer is in the Christian mythos, when the Morning Star descends into the Underworld and becomes Satan - when Horus descends into the Underworld and Set has power.
Egyptian occultic traditions (as reflected in Kabbalistic traditions) teach that Horus and Set, just like Yahweh and Satan, are two sides of the same coin, with one being unable to exist without the other.