diff --git a/cdoseaplay/config.py b/cdoseaplay/config.py
index c83db96..391ec84 100644
--- a/cdoseaplay/config.py
+++ b/cdoseaplay/config.py
@@ -6,6 +6,7 @@ base = 'https://cdosea.0x2620.org/static/render/'
 lang = '1080p'
 start = ''
 lights = False
+lanbox = False
 font = 'Menlo'
 # SimHei for chinese
 font_size = 28
diff --git a/cdoseaplay/lights.py b/cdoseaplay/lights.py
index 533c8a2..008433e 100755
--- a/cdoseaplay/lights.py
+++ b/cdoseaplay/lights.py
@@ -6,8 +6,10 @@ import time
 
 import ox
 import lanbox
+import sacn
 
 from .pi import random
+from . import config
 
 
 # Screen 1-5, Control, 6,7
@@ -43,14 +45,61 @@ LIGHTS = {
     9: (channels(0, 0.9), 0.1),
 }
 
+CURRENT_STATE = [0] * 16
+
+
+def send(state):
+    sender = sacn.sACNsender()
+    sender.start()
+    universe = 1
+    sender.activate_output(universe)
+    sender[1].multicast = True
+    n = 16
+    while n:
+        sender[1].dmx_data = [value] * n
+        time.sleep(1)
+        n -= 1
+
+    sender[1].dmx_data = [0]
+    time.sleep(10)  # send the data for 10 seconds
+
+
+def fade_to(target, duration):
+    global CURRENT_STATE
+    sender = sacn.sACNsender()
+    sender.start()
+    universe = 1
+    sender.activate_output(universe)
+    sender[1].multicast = True
+    current = CURRENT_STATE[0]
+    distance = target - current
+    steps = int(duration * 10)
+    step = duration/steps
+    delta = distance/steps
+    value = current
+    while steps:
+        value += delta
+        n = int(round(value))
+        if n != current:
+            current = n
+            sender[1].dmx_data = [n] * 16
+            CURRENT_STATE = sender[1].dmx_data[:16]
+        time.sleep(step)
+        steps -= 1
+    time.sleep(1)
+    sender.stop()
+
 
 def switch(state):
-    lights, fade = LIGHTS[state]
-    lb = lanbox.Lanbox()
-    #lb.getChannels(lights)
-    #lb.fadeTo(lights, fade)
-    lb.layerGo(state)
-
+    lights, duration = LIGHTS[state]
+    if config.lanbox:
+        lb = lanbox.Lanbox()
+        #lb.getChannels(lights)
+        #lb.fadeTo(lights, fade)
+        lb.layerGo(state)
+    else:
+        brightness = round(lights['7'] / 255 * 50)
+        fade_to(brightness, duration)
 
 if __name__ == '__main__':
     path = sys.argv[1]
diff --git a/setup.py b/setup.py
index 3f1def4..aa5950d 100644
--- a/setup.py
+++ b/setup.py
@@ -20,6 +20,7 @@ setup(
         'tornado',
         'mpmath',
         'lanbox',
+        'sacn',
         'mpv',
     ],
     keywords=[],