diff --git a/homeassistant/components/light/rfxtrx.py b/homeassistant/components/light/rfxtrx.py
index 64389a0fa59..f96a9f7b1fa 100644
--- a/homeassistant/components/light/rfxtrx.py
+++ b/homeassistant/components/light/rfxtrx.py
@@ -149,8 +149,8 @@ class RfxtrxLight(Light):
             self._brightness = ((brightness + 4) * 100 // 255 - 1)
 
         if hasattr(self, '_event') and self._event:
-            self._event.device.send_on(rfxtrx.RFXOBJECT.transport,
-                                       self._brightness)
+            self._event.device.send_dim(rfxtrx.RFXOBJECT.transport,
+                                        self._brightness)
 
         self._brightness = (self._brightness * 255 // 100)
         self._state = True