This is the 3484th most frequent Spanish word.
externas
"Externas" means "external" or "outside."
In this sentence, 'externas' is an adjective describing the lights, indicating that they are located outside or on the exterior of the building.
Las luces externas del edificio están encendidas.
The external lights of the building are on.
Here, 'externas' modifies 'influencias', suggesting that the influences come from outside sources or are not internal.
Recibimos influencias externas en nuestras decisiones.
We received external influences on our decisions.
In this context, 'externas' describes 'conexiones', referring to the connections or ports that are located outside the main body of the computer.