Heard the song and initially didn't like it, but it grew on me :)
I am uncertain of the lyrics, kind of hard to pick them out. Stars(*) are chords in 
question. SCROLL DOWN for CAPOed VERSION

* = Eb7sus4 or G7sus4
** = Optional


NO CAPO

C#m6
Ab*
In the darkness
F#         C#m6
Before the dawn
In the swelling
           F#
Of this storm
Bbm7                  C#6
Running round with apologies
            F#6
And hope is gone
         Ab            Abmaj7   F#
Leave a light,         a light  on

Bbm --------------- C#m6 -----------------
Bbm     [ch]C#/G#[/ch]
Millions are
          F#
Lost from home
Bbm       [ch]C#/G#[/ch]
In the swelling
         F#6
Swelling on
         Bbm            [ch]C#/G#[/ch]
When I'm running with a thunder
              F#
To bleed from thorns
F#6     [ch]C#/G#[/ch]        Ab      F#
Leave a light,       a light on
F#6       Abmaj7       F# -------
Leave a light, a light on

Bbm ----------- C#6 ------
Bbm      C#6   F#
Ooooooooooooooo-aaaaaahhhhhh x2
        Ab                F#
Leave a light on, a light on
        Ab             F#
Leave a light, a light on

INSTRUMENTAL: Bbm7 --------- C#6 ------ F# ------------| x2
              Bbm ----------- F# ---------- x 2--------|
              C#6 --- Bbm7 -------- C#6 --- F# --------|
              Bbm -------- C#6 --- F# -----------------| x4
              C#6 -------- F# -------------------------|
Bbm7
In the darkness
C#maj7     F#6        Bbm
Before the dawn

          Ab*
In the darkness
Ab         F#6
Before the dawn
        Ab             Ebm-Cm7**
Leave a light, a light on
Ebm       Abmaj7       Ebm
Leave a light, a light on


CAPO 1

Cm6
G*
In the darkness
F          Cm6
Before the dawn
In the swelling
           F
Of this storm
Am7                   C6
Running round with apologies
            F6
And hope is gone
         G             Gmaj7    F
Leave a light,         a light  on

Am --------------- Cm6 -----------------
Am       C/G
Millions are
          F
Lost from home
Am        C/G
In the swelling
         F6
Swelling on
         Am             C/G
When I'm running with a thunder
              F
To bleed from thorns
F6      C/G          G       F
Leave a light,       a light on
F6        Gmaj7        F -------
Leave a light, a light on

Am ----------- C6 ------
Am         C6   F
Ooooooooooooooo-aaaaaahhhhhh x2
        G                 F
Leave a light on, a light on
        G              F
Leave a light, a light on

INSTRUMENTAL: Am7 --------- C6 ------ F -----------| x2
              Am ----------- F ---------- x 2------|
              C6 --- Am7 -------- C6 --- F --------|
              Am -------- C6 --- F ----------------| x4
              C6 -------- F -----------------------|
Am7
In the darkness
Cmaj7      F6        Am
Before the dawn

          G*
In the darkness
G          F6
Before the dawn
        G              Dm-Bm7**
Leave a light, a light on
Dm        Gmaj7        Dm
Leave a light, a light on


Thanks all! Have fun playing!

- CableCaptain