"10k Sun" doesn't have any inherent meaning in the context of the TV series *The Lord of the Rings: The Rings of Power*. There's no known character, location, or object in the show or Tolkien's lore that uses this phrase.

Here's why it's likely not a reference to anything in the show:

* No Tolkien connection: The term "10k Sun" doesn't appear in J.R.R. Tolkien's writings.

* Lack of context: The phrase isn't mentioned in any promotional materials or official discussions related to the show.

Possible Interpretations:

* Fan-made terminology: It might be a term coined by fans, perhaps related to a specific character or event in the show.

* Misunderstanding: You might have misheard or misinterpreted something related to the show.

* A future reference: It's possible that the term will be introduced in a later season or episode.

If you can provide more context or details about where you encountered this phrase, it might be easier to determine its meaning.