diff --git a/homeassistant/components/smarttub/light.py b/homeassistant/components/smarttub/light.py
index 2cdcefb372b..accb105e88e 100644
--- a/homeassistant/components/smarttub/light.py
+++ b/homeassistant/components/smarttub/light.py
@@ -4,9 +4,9 @@ from smarttub import SpaLight
 from homeassistant.components.light import (
     ATTR_BRIGHTNESS,
     ATTR_EFFECT,
-    COLOR_MODE_BRIGHTNESS,
     EFFECT_COLORLOOP,
     SUPPORT_EFFECT,
+    ColorMode,
     LightEntity,
 )
 from homeassistant.config_entries import ConfigEntry
@@ -43,8 +43,8 @@ async def async_setup_entry(
 class SmartTubLight(SmartTubEntity, LightEntity):
     """A light on a spa."""
 
-    _attr_color_mode = COLOR_MODE_BRIGHTNESS
-    _attr_supported_color_modes = {COLOR_MODE_BRIGHTNESS}
+    _attr_color_mode = ColorMode.BRIGHTNESS
+    _attr_supported_color_modes = {ColorMode.BRIGHTNESS}
 
     def __init__(self, coordinator, light):
         """Initialize the entity."""