It was released on October 1, 2020, serving as the second single from Uchis' second studio album, Sin Miedo (del Amor y Otros Demonios).

"La Luz (Fín)" is a "soft to the touch" song blending Latin pop,[1][2] reggaeton,[3] and R&B[4][5] over a downtempo, "simple, but intoxicating" dembow beat.

[5][6][7] Kali Uchis described the song as having sexual undertones, saying it's about "the moment when you set your sights on someone and can't wait to do everything freaky imaginable with them.

Rob H of Beats Per Minute commented on the song's production and sensuality, calling it "intimidating in the levels of sexuality" and an "all around steamy affair".

[6] In a review of the parent album, Oliver Corrigan of Gigwise praised Uchis' vocal delivery, calling it "delicately intimate" and also noted that the song's musicality was reminiscent of her earlier R&B work.