How to Say "lit up" in Spanish
The Spanish word for “lit up” is “iluminado” — A2 level. This is a very common word in everyday Spanish.

Examples
El salón es muy grande e iluminado.
The living room is very large and well-lit.
Prefiero trabajar en un espacio bien iluminado.
I prefer to work in a well-lit space.
Las calles estaban iluminadas con luces de colores.
The streets were lit up with colored lights.
Matching the Noun
Since this word is an adjective here, you must change the ending to 'iluminada' if the thing you are describing is feminine (like 'la habitación') or 'iluminados/as' for plurals.
Use with 'Estar'
When saying a place 'is' lit up, we usually use the verb 'estar' because we are describing a current state or condition.
Lit vs. Turned On
Mistake: “La luz está iluminada.”
Correction: La luz está encendida. Use 'iluminado' for spaces that receive light, and 'encendido' for devices or bulbs that are actually turned on.
Related Translations
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