Something doesn't add up regarding the connection between Amdapor and Norvrandt...

[Ardox]

/snip

I'm pretty sure they are still 2 different poles. I'm referring to this article

It gets confusing because there are two different uses of "Darkness" and "Light" now. There are the actual forces/energies that we're dealing with at a large scale, which is what Koji is talking about in that interview (the only concept we had at that time).

Now Shadowbringers has thrown in Darkness and Light as Norvrandt's terms for the active and passive energy poles, which coincidentally line up with the aspects of actual Darkness and Light.
/snip

That interview was made in March 2017, 3.5 had launched in January 2017 and 4.0 launched in June. I'm going to make the assumption they had started to really pinned down what Astral/Umbral and what Light/Darkness were by that moment since they were already planning for the next expantion.

I really think the revelation we got from Urianger is that Astral and Umbral should now be distinguished from Light and Darkness. What was confusing me (and what i feel confuse a lot of player atm) is I made the relation Astral=Light and Umbral=Darkness since ARR and nothing made that assumption false up to that point. The explanation is pretty clear thought:
1) There's no umbral or astral energies, it's only a state of how one element or a mix of element manifest;
2) Darkness and Light are true energies, not elements;
3) Darkness and Light are not the same thing as Astral and Umbral; (But we now know they can have Umbral/Astral charges)



---EDIT---
Adding the relevant quote

Koji Fox: So, you have the elements—and it’s still six elements, there are no newly-discovered ones. Those elements have charges—umbral and astral. If something has “umbral energy”, it is one or more of those elements, individual or combined. So if elements have an umbral charge, it can be said that they are “umbral energies”. That’s where those terms come from, “astral energies” and “umbral energies” are not individual things, it’s a blanket term. Light and Dark are not elements, but they are energies…in a different sense. They are not elements, they are not of the elements, and they are not astral or umbral. It’s a different type of energy. You might see a Light and Dark sprite and think, oh, they must be elemetals, but those are made of an entirely different form of energy.

emphasize mine