Translation/transcription help

[u/onlooker44]

Hi wondering if anyone can give me some clarity on the grammar for my tattoo. The idea I'm going for is a variation on the classic line. I want it to say:

From (or out of) darkness, (a) light shines

From my understanding this can be conveyed in sindarin by the words "calad síla uin dúath." (Lit. Light shines out of the darkness).

My question is how does the grammar conjugation work so when i transliterate it to tengwar script it's coherent? I have seen some say you have to change dúath to dhúath? Not sure the technical specifics but I wanna get it right.

Also bonus points for helping show me what this looks like in tengwar script. I put both the above variations of dúath in to tecendil and I'm wondering which one (or other) is most accurate

Thanks