From ccb8d6af44cd561a3a19de85dc3a22ff1acb13a9 Mon Sep 17 00:00:00 2001
From: epenet <6771947+epenet@users.noreply.github.com>
Date: Thu, 19 Feb 2026 13:39:55 +0100
Subject: [PATCH] Use shorthand attribute in x10 light (#163444)

---
 homeassistant/components/x10/light.py | 43 ++++++++-------------------
 1 file changed, 13 insertions(+), 30 deletions(-)

diff --git a/homeassistant/components/x10/light.py b/homeassistant/components/x10/light.py
index fbdebe11657..035b306888c 100644
--- a/homeassistant/components/x10/light.py
+++ b/homeassistant/components/x10/light.py
@@ -63,48 +63,31 @@ def setup_platform(
 class X10Light(LightEntity):
     """Representation of an X10 Light."""
 
+    _attr_brightness: int
     _attr_color_mode = ColorMode.BRIGHTNESS
     _attr_supported_color_modes = {ColorMode.BRIGHTNESS}
 
     def __init__(self, light, is_cm11a):
         """Initialize an X10 Light."""
-        self._name = light["name"]
+        self._attr_name = light["name"]
         self._id = light["id"]
-        self._brightness = 0
-        self._state = False
+        self._attr_brightness = 0
+        self._attr_is_on = False
         self._is_cm11a = is_cm11a
 
-    @property
-    def name(self):
-        """Return the display name of this light."""
-        return self._name
-
-    @property
-    def brightness(self):
-        """Return the brightness of the light, scaled to base class 0..255.
-
-        This needs to be scaled from 0..x for use with X10 dimmers.
-        """
-        return self._brightness
-
-    def normalize_x10_brightness(self, brightness: float) -> float:
+    def normalize_x10_brightness(self, brightness: float) -> int:
         """Return calculated brightness values."""
         return int((brightness / 255) * 32)
 
-    @property
-    def is_on(self):
-        """Return true if light is on."""
-        return self._state
-
     def turn_on(self, **kwargs: Any) -> None:
         """Instruct the light to turn on."""
-        old_brightness = self._brightness
+        old_brightness = self._attr_brightness
         if old_brightness == 0:
             # Dim down from max if applicable, also avoids a "dim" command if an "on" is more appropriate
             old_brightness = 255
-        self._brightness = kwargs.get(ATTR_BRIGHTNESS, 255)
+        self._attr_brightness = kwargs.get(ATTR_BRIGHTNESS, 255)
         brightness_diff = self.normalize_x10_brightness(
-            self._brightness
+            self._attr_brightness
         ) - self.normalize_x10_brightness(old_brightness)
         command_suffix = ""
         # heyu has quite a messy command structure - we'll just deal with it here
@@ -121,7 +104,7 @@ class X10Light(LightEntity):
             command_suffix = f" {brightness_diff}"
         else:
             if self._is_cm11a:
-                if self._state:
+                if self._attr_is_on:
                     command_prefix = "dim"
                 else:
                     command_prefix = "dimb"
@@ -129,7 +112,7 @@ class X10Light(LightEntity):
                 command_prefix = "fdim"
             command_suffix = f" {-brightness_diff}"
         x10_command(f"{command_prefix} {self._id}{command_suffix}")
-        self._state = True
+        self._attr_is_on = True
 
     def turn_off(self, **kwargs: Any) -> None:
         """Instruct the light to turn off."""
@@ -137,13 +120,13 @@ class X10Light(LightEntity):
             x10_command(f"off {self._id}")
         else:
             x10_command(f"foff {self._id}")
-        self._brightness = 0
-        self._state = False
+        self._attr_brightness = 0
+        self._attr_is_on = False
 
     def update(self) -> None:
         """Fetch update state."""
         if self._is_cm11a:
-            self._state = bool(get_unit_status(self._id))
+            self._attr_is_on = bool(get_unit_status(self._id))
         else:
             # Not supported on CM17A
             pass