diff --git a/homeassistant/components/light/deconz.py b/homeassistant/components/light/deconz.py
index d6078490e7f..08d7f5773f7 100644
--- a/homeassistant/components/light/deconz.py
+++ b/homeassistant/components/light/deconz.py
@@ -174,6 +174,7 @@ class DeconzLight(Light):
         data = {'on': False}
 
         if ATTR_TRANSITION in kwargs:
+            data['bri'] = 0
             data['transitiontime'] = int(kwargs[ATTR_TRANSITION]) * 10
 
         if ATTR_FLASH in kwargs: