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like this wave texture, I want only the red color to emit light

So as you can see I am trying to recreate the added picture using wave texture node and I want only the red color to emit light. So that to do? and what should be the node set up?

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If you want the red part to emit light, use the black and white component from your Wave Texture as the Mix Factor Between a red Emission Shader and whatever you want the rest to be (I left it as a default principled BSDF with a black BaseColor, but you can use whatever you want.)

EmitLight

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