diff --git a/homeassistant/components/lifx/util.py b/homeassistant/components/lifx/util.py
index 9782fe4adba..62d0ea66f81 100644
--- a/homeassistant/components/lifx/util.py
+++ b/homeassistant/components/lifx/util.py
@@ -16,10 +16,8 @@ from homeassistant.components.light import (
     ATTR_BRIGHTNESS,
     ATTR_BRIGHTNESS_PCT,
     ATTR_COLOR_NAME,
-    ATTR_COLOR_TEMP,
     ATTR_COLOR_TEMP_KELVIN,
     ATTR_HS_COLOR,
-    ATTR_KELVIN,
     ATTR_RGB_COLOR,
     ATTR_XY_COLOR,
 )
@@ -114,18 +112,13 @@ def find_hsbk(hass: HomeAssistant, **kwargs: Any) -> list[float | int | None] |
         saturation = int(saturation / 100 * 65535)
         kelvin = 3500
 
-    if ATTR_KELVIN in kwargs:
+    if "color_temp" in kwargs:  # old ATTR_COLOR_TEMP
+        # added in 2025.1, can be removed in 2026.1
         _LOGGER.warning(
-            "The 'kelvin' parameter is deprecated. Please use 'color_temp_kelvin' for"
+            "The 'color_temp' parameter is deprecated. Please use 'color_temp_kelvin' for"
             " all service calls"
         )
-        kelvin = kwargs.pop(ATTR_KELVIN)
-        saturation = 0
-
-    if ATTR_COLOR_TEMP in kwargs:
-        kelvin = color_util.color_temperature_mired_to_kelvin(
-            kwargs.pop(ATTR_COLOR_TEMP)
-        )
+        kelvin = color_util.color_temperature_mired_to_kelvin(kwargs.pop("color_temp"))
         saturation = 0
 
     if ATTR_COLOR_TEMP_KELVIN in kwargs:
diff --git a/tests/components/lifx/test_light.py b/tests/components/lifx/test_light.py
index 084ea0c674b..88c2115ce47 100644
--- a/tests/components/lifx/test_light.py
+++ b/tests/components/lifx/test_light.py
@@ -35,7 +35,6 @@ from homeassistant.components.light import (
     ATTR_COLOR_TEMP_KELVIN,
     ATTR_EFFECT,
     ATTR_HS_COLOR,
-    ATTR_KELVIN,
     ATTR_RGB_COLOR,
     ATTR_SUPPORTED_COLOR_MODES,
     ATTR_TRANSITION,
@@ -1719,7 +1718,7 @@ async def test_lifx_set_state_color(hass: HomeAssistant) -> None:
 
 
 async def test_lifx_set_state_kelvin(hass: HomeAssistant) -> None:
-    """Test set_state works with old and new kelvin parameter names."""
+    """Test set_state works with kelvin parameter names."""
     already_migrated_config_entry = MockConfigEntry(
         domain=DOMAIN, data={CONF_HOST: "127.0.0.1"}, unique_id=SERIAL
     )
@@ -1748,15 +1747,6 @@ async def test_lifx_set_state_kelvin(hass: HomeAssistant) -> None:
     assert bulb.set_power.calls[0][0][0] is False
     bulb.set_power.reset_mock()
 
-    await hass.services.async_call(
-        DOMAIN,
-        "set_state",
-        {ATTR_ENTITY_ID: entity_id, ATTR_BRIGHTNESS: 255, ATTR_KELVIN: 3500},
-        blocking=True,
-    )
-    assert bulb.set_color.calls[0][0][0] == [32000, 0, 65535, 3500]
-    bulb.set_color.reset_mock()
-
     await hass.services.async_call(
         DOMAIN,
         "set_state",