diff --git a/homeassistant/components/upb/light.py b/homeassistant/components/upb/light.py
index 609bf0f0e32..2ba9f8ad8ad 100644
--- a/homeassistant/components/upb/light.py
+++ b/homeassistant/components/upb/light.py
@@ -3,10 +3,9 @@ from homeassistant.components.light import (
     ATTR_BRIGHTNESS,
     ATTR_FLASH,
     ATTR_TRANSITION,
-    COLOR_MODE_BRIGHTNESS,
-    COLOR_MODE_ONOFF,
     SUPPORT_FLASH,
     SUPPORT_TRANSITION,
+    ColorMode,
     LightEntity,
 )
 from homeassistant.config_entries import ConfigEntry
@@ -57,11 +56,11 @@ class UpbLight(UpbAttachedEntity, LightEntity):
         self._brightness = self._element.status
 
     @property
-    def color_mode(self) -> str:
+    def color_mode(self) -> ColorMode:
         """Return the color mode of the light."""
         if self._element.dimmable:
-            return COLOR_MODE_BRIGHTNESS
-        return COLOR_MODE_ONOFF
+            return ColorMode.BRIGHTNESS
+        return ColorMode.ONOFF
 
     @property
     def supported_color_modes(self) -> set[str]: