diff --git a/scripts/Game_Map.rb b/scripts/Game_Map.rb
index fe24411..fe0cb92 100644
--- a/scripts/Game_Map.rb
+++ b/scripts/Game_Map.rb
@@ -28,6 +28,7 @@ class Game_Map
   attr_accessor :particles_type           # particles name
   attr_accessor :clamped_panorama         # panorama is clamped?
   attr_accessor :wrapping                 # map is wrapping?
+  attr_accessor :ambient                  # ambient light
   attr_reader   :passages                 # passage table
   attr_reader   :priorities               # prioroty table
   attr_reader   :terrain_tags             # terrain tag table
@@ -109,6 +110,8 @@ class Game_Map
     @clamped_panorama = false
     # Unwrap map
     @wrapping = false
+    # Full bright ambient light
+    @ambient = Tone.new(0, 0, 0, 0)
 
     # Construct map name path
     mapinfo = load_data("Data/MapInfos.rxdata")
diff --git a/scripts/RPG.rb b/scripts/RPG.rb
index a15ca60..faa2bdc 100644
--- a/scripts/RPG.rb
+++ b/scripts/RPG.rb
@@ -16,3 +16,13 @@ module RPG
     end
   end
 end
+
+class Tone
+  def +(o)
+    Tone.new(self.red + o.red, self.green + o.green, self.blue + o.blue, self.gray + o.gray)
+  end
+
+  def *(s)
+    Tone.new(self.red * s, self.green * s, self.blue * s, self.gray * s)
+  end
+end
diff --git a/scripts/Scene_Map.rb b/scripts/Scene_Map.rb
index fddecbc..fced8a9 100644
--- a/scripts/Scene_Map.rb
+++ b/scripts/Scene_Map.rb
@@ -341,12 +341,6 @@ class Scene_Map
   #--------------------------------------------------------------------------
   # * Lighting operations
   #--------------------------------------------------------------------------
-  def ambient
-    @spriteset.ambient
-  end
-  def ambient=(val)
-    @spriteset.ambient = val
-  end
   def add_light(id, filename, intensity, x, y)
     @spriteset.add_light(id, filename, intensity, x, y)
   end
@@ -356,9 +350,6 @@ class Scene_Map
   def clear_lights
     @spriteset.clear_lights
   end
-  def fade_in_bulb
-    @spriteset.fade_in_bulb
-  end
   #--------------------------------------------------------------------------
   # * Particle operations
   #--------------------------------------------------------------------------
diff --git a/scripts/Script.rb b/scripts/Script.rb
index c90663d..2468932 100644
--- a/scripts/Script.rb
+++ b/scripts/Script.rb
@@ -46,6 +46,10 @@ module Script
   end
 end
 
+def has_lightbulb?
+  $game_party.item_number(1) > 0
+end
+
 def enter_name
   $game_temp.name_calling = true
 end
@@ -76,14 +80,12 @@ def particles(type)
   $game_map.particles_type = type
 end
 
-def ambient(r, g = -1, b = -1)
-  g = r if g < 0
-  b = r if b < 0
-  #$scene.ambient = Color.new(r, g, b)
+def ambient(r, g, b, gray = 0)
+  $game_map.ambient.set(r, g, b, gray)
 end
 
 def clear_ambient
-  #$scene.ambient = Color.new(255, 255, 255)
+  $game_map.ambient.set(0, 0, 0, 0)
 end
 
 def add_light(id, file, intensity, x, y)
@@ -98,10 +100,6 @@ def clear_lights
   #$scene.clear_lights
 end
 
-def fade_in_bulb
-  #$scene.fade_in_bulb
-end
-
 def clamp_panorama
   $game_map.clamped_panorama = true
 end
@@ -109,3 +107,8 @@ end
 def wrap_map
   $game_map.wrapping = true
 end
+
+# Map specific settings
+def green_ambient
+  ambient -50, -50, -50
+end
diff --git a/scripts/Spriteset_Map.rb b/scripts/Spriteset_Map.rb
index b9f530c..84b8362 100644
--- a/scripts/Spriteset_Map.rb
+++ b/scripts/Spriteset_Map.rb
@@ -62,6 +62,10 @@ class Spriteset_Map
     end
     # Make timer sprite
     @timer_sprite = Sprite_Timer.new
+    # Make lightbulb sprite
+    @bulb = Sprite.new(@viewport_lights)
+    @bulb.bitmap = RPG::Cache.light('bulb')
+    @bulb.opacity = has_lightbulb? ? 255 : 0
     # Frame update
     update
   end
@@ -223,10 +227,14 @@ class Spriteset_Map
       sprite.update
     end
     # Update bulb if fading in
-    if @bulb && @bulb.intensity < @bulb_intensity
-      @bulb.intensity += 0.005
-      if @bulb.intensity > @bulb_intensity
-        @bulb.intensity = @bulb_intensity
+    @bulb.tone = $game_map.ambient
+    if has_lightbulb?
+      if @bulb.opacity < 255
+        @bulb.opacity += 2.125
+      end
+    else
+      if @bulb.opacity > 0
+        @bulb.opacity -= 2.125
       end
     end
     # Update particles
@@ -234,7 +242,7 @@ class Spriteset_Map
     # Update timer sprite
     @timer_sprite.update
     # Set screen color tone and shake position
-    @viewport.tone = $game_screen.tone
+    @viewport.tone = $game_screen.tone + $game_map.ambient * (1.0 - @bulb.opacity / 255.0)
     @viewport.ox = $game_screen.shake
     # Set screen flash color
     @viewport_flash.color = $game_screen.flash_color