Use shorthand attrs for tplink color temp min/max (#106796)

The valid_temperature_range property does a regex match over
every possible model. Avoid calling it more than once since
it will never change as its based on the model

homeassistant/components/tplink/light.py

@@ -185,6 +185,9 @@ class TPLinkSmartBulb(CoordinatedTPLinkEntity, LightEntity):
         modes: set[ColorMode] = set()
         if device.is_variable_color_temp:
             modes.add(ColorMode.COLOR_TEMP)
+            temp_range = device.valid_temperature_range
+            self._attr_min_color_temp_kelvin = temp_range.min
+            self._attr_max_color_temp_kelvin = temp_range.max
         if device.is_color:
             modes.add(ColorMode.HS)
         if device.is_dimmable:
@@ -251,16 +254,6 @@ class TPLinkSmartBulb(CoordinatedTPLinkEntity, LightEntity):
             transition = int(transition * 1_000)
         await self.device.turn_off(transition=transition)
 
-    @property
-    def min_color_temp_kelvin(self) -> int:
-        """Return minimum supported color temperature."""
-        return cast(int, self.device.valid_temperature_range.min)
-
-    @property
-    def max_color_temp_kelvin(self) -> int:
-        """Return maximum supported color temperature."""
-        return cast(int, self.device.valid_temperature_range.max)
-
     @property
     def color_temp_kelvin(self) -> int:
         """Return the color temperature of this light."""