The melody of Leave A Light On by Tom Walker runs 380 notes across 42 bars, 3:00 long in Gm at 140 beats per minute. The tab sits almost entirely in the first two frets, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? Leave A Light On chords and lyrics.