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But Light is like a generic incarnation of god but also knowledge, revelation etc., it’s way more absolute than peace or even love. I think Light does make sense from their perspective, and in the catholic symbolism it is identified basically with all positive stuff.
You had a bunch of other references that make sense eh, I am not familiar with them, so I respect that people might have different perceptions.
I get things like “enlightenment”, etc. But the average person (at least in the US) that isn’t already Catholic has a strong possibility of already being told they aren’t real Christians, and isn’t going to know or care about etymology, and will assume it’s Lucifer. They could call the main character Satin after the cloth and it’s have the same effect, even though they aren’t related.