Fix deCONZ groups don't report ctmax/min (#36432)

* Groups don't report ctmax/min

homeassistant/components/deconz/light.py

@@ -82,7 +82,7 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
     async_add_group(gateway.api.groups.values())
 
 
-class DeconzLight(DeconzDevice, LightEntity):
+class DeconzBaseLight(DeconzDevice, LightEntity):
     """Representation of a deCONZ light."""
 
     def __init__(self, device, gateway):
@@ -130,16 +130,6 @@ class DeconzLight(DeconzDevice, LightEntity):
             return color_util.color_xy_to_hs(*self._device.xy)
         return None
 
-    @property
-    def max_mireds(self):
-        """Return the warmest color_temp that this light supports."""
-        return self._device.ctmax or super().max_mireds
-
-    @property
-    def min_mireds(self):
-        """Return the coldest color_temp that this light supports."""
-        return self._device.ctmin or super().min_mireds
-
     @property
     def is_on(self):
         """Return true if light is on."""
@@ -214,7 +204,21 @@ class DeconzLight(DeconzDevice, LightEntity):
         return attributes
 
 
-class DeconzGroup(DeconzLight):
+class DeconzLight(DeconzBaseLight):
+    """Representation of a deCONZ light."""
+
+    @property
+    def max_mireds(self):
+        """Return the warmest color_temp that this light supports."""
+        return self._device.ctmax or super().max_mireds
+
+    @property
+    def min_mireds(self):
+        """Return the coldest color_temp that this light supports."""
+        return self._device.ctmin or super().min_mireds
+
+
+class DeconzGroup(DeconzBaseLight):
     """Representation of a deCONZ group."""
 
     def __init__(self, device, gateway):