Nodes of light don't contribute to level, they are a currency. You are awarded with them upon leveling past level 20, you need armor with light to increase your actual level.
English
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Read the article
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Yup he's right. :)
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I have.
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So you know it's called motes of light... :)
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Yes I do, it was just a typo, I'm on a phone.
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I'm just messin wit ya
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But they do contribute to your level indirectly because you have to use them on armor and such in order to level up.
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motes of light*