Migrate qwikswitch light to color_mode

homeassistant/components/qwikswitch/light.py

@@ -1,7 +1,7 @@
 """Support for Qwikswitch Relays and Dimmers."""
 from __future__ import annotations
 
-from homeassistant.components.light import SUPPORT_BRIGHTNESS, LightEntity
+from homeassistant.components.light import ColorMode, LightEntity
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
@@ -33,6 +33,11 @@ def brightness(self):
         return self.device.value if self.device.is_dimmer else None
 
     @property
-    def supported_features(self):
-        """Flag supported features."""
-        return SUPPORT_BRIGHTNESS if self.device.is_dimmer else 0
+    def color_mode(self) -> ColorMode:
+        """Return the color mode of the light."""
+        return ColorMode.BRIGHTNESS if self.device.is_dimmer else ColorMode.ONOFF
+
+    @property
+    def supported_color_modes(self) -> set[ColorMode]:
+        """Flag supported color modes."""
+        return {self.color_mode}