This is the 7314th most frequent Catalan word.
apaguen
"Apaguen" means "they turn off" or "they extinguish" in English.
Here, 'apaguen' is used in a reflexive form (s'apaguen) to indicate an action performed by the subject of the sentence.
Aquestes llums s'apaguen automàticament.
These lights turn off automatically.
In this instance, 'apaguen' indicates an action performed actively by the subject ('they').
Quan arribin les deu, apaguen el televisor.
When it gets to ten o'clock, they turn off the television.
Here, 'apaguen' is used with 'els focs artificials' as the subject, indicating they cease emitting light or fire.