Spanish Phrase
¿Y si se va la luz?
Meaning
A hypothetical question asking what would happen if the electricity stops working. It’s often used when planning for a possible power outage or when discussing contingencies.
When to use
Use this phrase when you want to explore a possible scenario, especially in conversations about emergencies, events, or daily life where a blackout could affect your plans.
✦Grammar Breakdown
¿Ysisevalaluz?
Y (conjunción)
Used here to introduce a hypothetical scenario, similar to “what if”.
si (condicional)
Introduces a condition; it translates to “if”.
se va (verbo pronominal ir)
The pronominal form of ir (to go) in third‑person singular present; “se va” means “goes away/turns off”.
la luz (sustantivo)
Literally “the light”, but in everyday Spanish it refers to electricity.
🗨In Conversation
¿Y si se va la luz?
What if the power goes out?
Entonces tendremos que usar las velas y cargar los móviles con el power bank.
Then we’ll have to use candles and charge our phones with the power bank.
✕Common Mistakes
¿Y si se va el luz?
Luz is feminine; the article must be "la".
¿Y si se está la luz?
Use "se va" (goes off) for a blackout, not "está" (is).
¿Y, si, se va la luz?
Do not add an extra comma after "si"; the phrase is a single clause.
↔Alternatives
¿Qué pasa si se corta la luz?
What happens if the electricity is cut?
¿Y si se apaga la luz?
And if the light goes out?
¿Qué harías si se va la luz?
What would you do if the power goes out?
Cultural Tip
In many Spanish‑speaking countries, "se va la luz" is a common colloquial way to refer to a blackout. It’s informal, so use it with friends or in casual settings. In more formal contexts you might say "se produce un corte de energía" or "se interrumpe el suministro eléctrico".