diff --git a/custom_components/circadian_lighting/switch.py b/custom_components/circadian_lighting/switch.py
index eee3751e..75e122fb 100755
--- a/custom_components/circadian_lighting/switch.py
+++ b/custom_components/circadian_lighting/switch.py
@@ -382,7 +382,8 @@ class CircadianSwitch(SwitchEntity, RestoreEntity):
             await asyncio.wait(tasks)
 
     async def _light_state_changed(self, entity_id, from_state, to_state):
-        if to_state.state == "on" and (from_state is None or from_state.state != "on"):
+        assert to_state.state == "on"
+        if from_state is None or from_state.state != "on":
             _LOGGER.debug(_difference_between_states(from_state, to_state))
             await self._force_update_switch(lights=[entity_id])