diff --git a/homeassistant/components/lifx/const.py b/homeassistant/components/lifx/const.py
index 9b213cc9f6d..667afe1125d 100644
--- a/homeassistant/components/lifx/const.py
+++ b/homeassistant/components/lifx/const.py
@@ -64,3 +64,6 @@ DATA_LIFX_MANAGER = "lifx_manager"
 LIFX_CEILING_PRODUCT_IDS = {176, 177}
 
 _LOGGER = logging.getLogger(__package__)
+
+# _ATTR_COLOR_TEMP deprecated - to be removed in 2026.1
+_ATTR_COLOR_TEMP = "color_temp"
diff --git a/homeassistant/components/lifx/manager.py b/homeassistant/components/lifx/manager.py
index 759d08707cd..27e62717e96 100644
--- a/homeassistant/components/lifx/manager.py
+++ b/homeassistant/components/lifx/manager.py
@@ -15,7 +15,6 @@ from homeassistant.components.light import (
     ATTR_BRIGHTNESS,
     ATTR_BRIGHTNESS_PCT,
     ATTR_COLOR_NAME,
-    ATTR_COLOR_TEMP,
     ATTR_COLOR_TEMP_KELVIN,
     ATTR_HS_COLOR,
     ATTR_RGB_COLOR,
@@ -30,7 +29,7 @@ from homeassistant.core import HomeAssistant, ServiceCall, callback
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.service import async_extract_referenced_entity_ids
 
-from .const import ATTR_THEME, DATA_LIFX_MANAGER, DOMAIN
+from .const import _ATTR_COLOR_TEMP, ATTR_THEME, DATA_LIFX_MANAGER, DOMAIN
 from .coordinator import LIFXUpdateCoordinator, Light
 from .util import convert_8_to_16, find_hsbk
 
@@ -126,7 +125,8 @@ LIFX_EFFECT_PULSE_SCHEMA = cv.make_entity_service_schema(
         vol.Exclusive(ATTR_COLOR_TEMP_KELVIN, COLOR_GROUP): vol.All(
             vol.Coerce(int), vol.Range(min=1500, max=9000)
         ),
-        vol.Exclusive(ATTR_COLOR_TEMP, COLOR_GROUP): cv.positive_int,
+        # _ATTR_COLOR_TEMP deprecated - to be removed in 2026.1
+        vol.Exclusive(_ATTR_COLOR_TEMP, COLOR_GROUP): cv.positive_int,
         ATTR_PERIOD: vol.All(vol.Coerce(float), vol.Range(min=0.05)),
         ATTR_CYCLES: vol.All(vol.Coerce(float), vol.Range(min=1)),
         ATTR_MODE: vol.In(PULSE_MODES),
diff --git a/homeassistant/components/lifx/util.py b/homeassistant/components/lifx/util.py
index 62d0ea66f81..ffffe7a4856 100644
--- a/homeassistant/components/lifx/util.py
+++ b/homeassistant/components/lifx/util.py
@@ -27,6 +27,7 @@ from homeassistant.helpers import device_registry as dr
 import homeassistant.util.color as color_util
 
 from .const import (
+    _ATTR_COLOR_TEMP,
     _LOGGER,
     DEFAULT_ATTEMPTS,
     DOMAIN,
@@ -112,13 +113,15 @@ def find_hsbk(hass: HomeAssistant, **kwargs: Any) -> list[float | int | None] |
         saturation = int(saturation / 100 * 65535)
         kelvin = 3500
 
-    if "color_temp" in kwargs:  # old ATTR_COLOR_TEMP
+    if _ATTR_COLOR_TEMP in kwargs:
         # added in 2025.1, can be removed in 2026.1
         _LOGGER.warning(
             "The 'color_temp' parameter is deprecated. Please use 'color_temp_kelvin' for"
             " all service calls"
         )
-        kelvin = color_util.color_temperature_mired_to_kelvin(kwargs.pop("color_temp"))
+        kelvin = color_util.color_temperature_mired_to_kelvin(
+            kwargs.pop(_ATTR_COLOR_TEMP)
+        )
         saturation = 0
 
     if ATTR_COLOR_TEMP_KELVIN in kwargs: