diff --git a/homeassistant/components/upb/light.py b/homeassistant/components/upb/light.py
index 4a71789423f..50e6d50bb4c 100644
--- a/homeassistant/components/upb/light.py
+++ b/homeassistant/components/upb/light.py
@@ -57,7 +57,7 @@ class UpbLight(UpbAttachedEntity, LightEntity):
     def __init__(self, element, unique_id, upb):
         """Initialize an UpbLight."""
         super().__init__(element, unique_id, upb)
-        self._brightness = self._element.status
+        self._attr_brightness: int = self._element.status
 
     @property
     def color_mode(self) -> ColorMode:
@@ -78,15 +78,10 @@ class UpbLight(UpbAttachedEntity, LightEntity):
             return LightEntityFeature.TRANSITION | LightEntityFeature.FLASH
         return LightEntityFeature.FLASH
 
-    @property
-    def brightness(self):
-        """Get the brightness."""
-        return self._brightness
-
     @property
     def is_on(self) -> bool:
         """Get the current brightness."""
-        return self._brightness != 0
+        return self._attr_brightness != 0
 
     async def async_turn_on(self, **kwargs: Any) -> None:
         """Turn on the light."""
@@ -123,4 +118,4 @@ class UpbLight(UpbAttachedEntity, LightEntity):
 
     def _element_changed(self, element, changeset):
         status = self._element.status
-        self._brightness = round(status * 2.55) if status else 0
+        self._attr_brightness = round(status * 2.55) if status else 0