Usage Note
Lumínico is a technical adjective meaning 'relating to light', used in physics and optics (e.g., energía lumínica — light energy, contaminación lumínica — light pollution). It is a learned formation and is not the everyday word for bright or luminous — luminoso and brillante are far more common in general usage.
Examples
"La contaminación lumínica afecta a los animales nocturnos."
Natural Translation
Light pollution affects nocturnal animals.

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