This is the 1303rd most frequent Spanish word.
parecen
"Parecen" means "they seem" or "they look like."
Here, 'parecen' illustrates the perceived mood of my friends at the event.
Mis amigos parecen felices en la fiesta.
My friends seem happy at the party.
Here, 'parecen' is used to indicate the apparent state or impression regarding their interest in the project.
Ellos parecen interesados en el proyecto.
They seem interested in the project.
In this case, 'parecen' describes the perceived quality of the brightness of the lights.