sentences:  "Northern Lites" is 3 minute and 31 seconds long and is in the key of E minor.The song begins with an intro with steel drums, featuring a flanging effect, before a brass section enters after 6 seconds playing a melody line accompanied by a güiro, sparse drums and an acoustic guitar playing the chords Em7 and A.The melody line plays twice after which Gruff Rhys begins singing the first verse alongside the güiro, guitar and steel drums which no longer have a flange effect.