diff --git a/homeassistant/components/light/deconz.py b/homeassistant/components/light/deconz.py
index 20160edf806..8aacac323b8 100644
--- a/homeassistant/components/light/deconz.py
+++ b/homeassistant/components/light/deconz.py
@@ -155,7 +155,7 @@ class DeconzLight(Light):
             data['bri'] = kwargs[ATTR_BRIGHTNESS]
 
         if ATTR_TRANSITION in kwargs:
-            data['transitiontime'] = int(kwargs[ATTR_TRANSITION]) * 10
+            data['transitiontime'] = int(kwargs[ATTR_TRANSITION] * 10)
 
         if ATTR_FLASH in kwargs:
             if kwargs[ATTR_FLASH] == FLASH_SHORT:
@@ -179,7 +179,7 @@ class DeconzLight(Light):
 
         if ATTR_TRANSITION in kwargs:
             data['bri'] = 0
-            data['transitiontime'] = int(kwargs[ATTR_TRANSITION]) * 10
+            data['transitiontime'] = int(kwargs[ATTR_TRANSITION] * 10)
 
         if ATTR_FLASH in kwargs:
             if kwargs[ATTR_FLASH] == FLASH_SHORT: