Coming from "Espiritu III", maybe not Espiritu's best effort, this is an uncommon and fascinating track. It is a rather long one (more than 7 minutes) and includes a remarkable sung melody, supported by spacey instrumentals (and a long finale) maily driven by the piano, the bass guitar and assorted keyboards. The sound of the '80s is there, but the well built architecture of "Lento juego de luces" ("Slow light effects" in English) strongly belongs to the previous decade.
"Espiritu III" was, of course, the third studio album by the band.
These Argentinian musicians know how to write and arrange good songs and always try to skip trivial solutions, even if their music never goes experimental. That's what you'll fine here: an enjoyable track suspended between prog, pop and electronic easy listening, a song that can dig its way inside the listener's soul. That's all I can expect of a prog song.