diff --git a/mist/leveldata_selena.inc b/mist/leveldata_selena.inc
index 19259401..f6b15b5e 100644
--- a/mist/leveldata_selena.inc
+++ b/mist/leveldata_selena.inc
@@ -579,7 +579,11 @@ location30:
 	.word	ladder_bottom_lzsa		; east bg
 	.word	tunnel_basement_lzsa		; west bg
 	.byte	BG_EAST|BG_WEST
-	.byte	$ff
+	.byte	DIRECTION_W		; special exit
+	.byte	32,40		; special x
+	.byte	22,36		; special y
+	.word	tunnel_toggle_lights-1	; special function
+
 
 ; SELENA_TUNNEL		-- middle of tunnel (dark for now)
 location31:
@@ -613,7 +617,10 @@ location32:
 	.word	tunnel_basement_lzsa		; east bg
 	.word	ladder_bottom_lzsa		; west bg
 	.byte	BG_EAST|BG_WEST
-	.byte	$ff
+	.byte	DIRECTION_E		; special exit
+	.byte	32,40		; special x
+	.byte	22,36		; special y
+	.word	tunnel_toggle_lights-1	; special function
 
 ; SELENA_ANTENNA_MID	-- antenna ladder, mid
 location33:
diff --git a/mist/selena.s b/mist/selena.s
index e6d9f860..a47b13fe 100644
--- a/mist/selena.s
+++ b/mist/selena.s
@@ -43,6 +43,11 @@ selena_start:
 	;=================
 	; init vars
 
+
+	; update the light background
+
+	jsr	update_tunnel_lights
+
 	; copy in rocket note puzzle state
 	lda	ROCKET_NOTE1
 	sta	rocket_notes
diff --git a/mist/selena_sound_puzzle.s b/mist/selena_sound_puzzle.s
index cfb9439c..29782c42 100644
--- a/mist/selena_sound_puzzle.s
+++ b/mist/selena_sound_puzzle.s
@@ -1304,6 +1304,90 @@ red_button_sprite:
 ; switch up = lights on
 ; switch down = lights off
 ; turning one switch also flips other one
+;
+; technically the bottom of steps gets slightly lighter but we ignore
+; also in game the two bottom locations are slightly different
+; you also can click the switch from multiple angles but we removed
+;	that as it made things a lot easier
+
+tunnel_toggle_lights:
+	lda	SELENA_BUTTON_STATUS
+	eor	#SELENA_LIGHTSWITCH
+	sta	SELENA_BUTTON_STATUS
+
+	jsr	update_tunnel_lights
+	jmp	change_location
+
+
+	;===========================================
+	; update backgrounds based on light switch
+	;===========================================
+
+update_tunnel_lights:
+
+	lda	SELENA_BUTTON_STATUS
+	bmi	tunnel_lights_on
+
+tunnel_lights_off:
+
+	ldy	#LOCATION_EAST_BG
+
+	lda	#<tunnel_e_lzsa
+	sta	location31,Y				; SELENA_TUNNEL
+	lda	#>tunnel_e_lzsa
+	sta	location31+1,Y				; SELENA_TUNNEL
+
+	lda	#<tunnel_basement_lzsa
+	sta	location32,Y				; SELENA_ANTENNA_BASEMENT
+	lda	#>tunnel_basement_lzsa
+	sta	location32+1,Y				; SELENA_ANTENNA_BASEMENT
+
+	ldy	#LOCATION_WEST_BG
+
+	lda	#<tunnel_w_lzsa
+	sta	location31,Y				; SELENA_TUNNEL
+	lda	#>tunnel_w_lzsa
+	sta	location31+1,Y				; SELENA_TUNNEL
+
+	lda	#<tunnel_basement_lzsa
+	sta	location30,Y				; SELENA_TUNNEL_BASEMENT
+	lda	#>tunnel_basement_lzsa
+	sta	location30+1,Y				; SELENA_TUNNEL_BASEMENT
+
+	jmp	done_tunnel_lights
+
+tunnel_lights_on:
+
+	ldy	#LOCATION_EAST_BG
+
+	lda	#<tunnel_middle_lightson_e_lzsa
+	sta	location31,Y				; SELENA_TUNNEL
+	lda	#>tunnel_middle_lightson_e_lzsa
+	sta	location31+1,Y				; SELENA_TUNNEL
+
+	lda	#<tunnel_lightson_e_lzsa
+	sta	location32,Y				; SELENA_ANTENNA_BASEMENT
+	lda	#>tunnel_lightson_e_lzsa
+	sta	location32+1,Y				; SELENA_ANTENNA_BASEMENT
+
+	ldy	#LOCATION_WEST_BG
+
+	lda	#<tunnel_middle_lightson_w_lzsa
+	sta	location31,Y				; SELENA_TUNNEL
+	lda	#>tunnel_middle_lightson_w_lzsa
+	sta	location31+1,Y				; SELENA_TUNNEL
+
+	lda	#<tunnel_lightson_w_lzsa
+	sta	location30,Y				; SELENA_TUNNEL_BASEMENT
+	lda	#>tunnel_lightson_w_lzsa
+	sta	location30+1,Y				; SELENA_TUNNEL_BASEMENT
+
+
+done_tunnel_lights:
+
+	rts
+
+
 
 
 
diff --git a/mist/zp.inc b/mist/zp.inc
index eb38bd0f..3da81bbc 100644
--- a/mist/zp.inc
+++ b/mist/zp.inc
@@ -246,7 +246,7 @@ SELENA_BUTTON_STATUS	= $CA
 	SELENA_BUTTON3	=	$04	; CLOCK (ticking)
 	SELENA_BUTTON4	=	$08	; CRYSTALS (whistle)
 	SELENA_BUTTON5	=	$10	; TUNNEL (wind)
-
+	SELENA_LIGHTSWITCH=	$80	; light in the tunnel
 
 SELENA_ANTENNA1		= $CB
 SELENA_ANTENNA2		= $CC