diff --git a/README.md b/README.md
index d15c5249..3f924fb8 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,10 @@ This feature is available when `take_over_control` is enabled.
 Additionally, enabling `detect_non_ha_changes` allows Adaptive Lighting to detect all state changes, including those made outside of Home Assistant, by comparing the light's state to its previously used settings.
 The `adaptive_lighting.manual_control` event is fired when a light is marked as "manually controlled," allowing for integration with automations 🤖.
 
+With `expand_light_groups: false`, manual control belongs to the group. A direct member change cannot pause adaptation for only that member; use group-level manual control or enable expansion for individual tracking.
+Explicit member targets in Adaptive Lighting services stay individual targets and do not mark or command the whole group.
+Changing expansion at runtime discards tracking and pending adaptation for targets no longer used by any profile.
+
 The Adaptive Lighting switch exposes these read-only attributes for its lights:
 
 - `manual_control`: lights with any attribute marked as manually controlled.
@@ -166,6 +170,7 @@ The YAML and frontend configuration methods support all of the options listed be
 | `intercept`                                 | Intercept and adapt `light.turn_on` calls to enabling instantaneous color and brightness adaptation. 🏎️ Disable for lights that do not support `light.turn_on` with color and brightness.                                                                                                                                                                                                     | `True`         | `bool`                                  |
 | `multi_light_intercept`                     | Intercept and adapt `light.turn_on` calls that target multiple lights. ➗⚠️ This might result in splitting up a single `light.turn_on` call into multiple calls, e.g., when lights are in different switches. Requires `intercept` to be enabled.                                                                                                                                             | `True`         | `bool`                                  |
 | `include_config_in_attributes`              | Show all options as attributes on the switch in Home Assistant when set to `true`. 📝                                                                                                                                                                                                                                                                                                         | `False`        | `bool`                                  |
+| `expand_light_groups`                       | Expand light groups to their members (`true`, default). Set `false` to send commands to the group and track manual control for the group. Explicit member targets in services stay individual targets.                                                                                                                                                                                        | `True`         | `bool`                                  |
 
 <!-- OUTPUT:END -->
 
diff --git a/custom_components/adaptive_lighting/const.py b/custom_components/adaptive_lighting/const.py
index 7acf2781..afead25c 100644
--- a/custom_components/adaptive_lighting/const.py
+++ b/custom_components/adaptive_lighting/const.py
@@ -291,6 +291,14 @@ DOCS[CONF_MULTI_LIGHT_INTERCEPT] = (
     "Requires `intercept` to be enabled."
 )
 
+CONF_EXPAND_LIGHT_GROUPS, DEFAULT_EXPAND_LIGHT_GROUPS = "expand_light_groups", True
+DOCS[CONF_EXPAND_LIGHT_GROUPS] = (
+    "Expand light groups to their members (`true`, default). Set `false` to send "
+    "commands to the group and track manual control for the group. Explicit member "
+    "targets in services stay individual targets."
+)
+
+
 SLEEP_MODE_SWITCH = "sleep_mode_switch"
 ADAPT_COLOR_SWITCH = "adapt_color_switch"
 ADAPT_BRIGHTNESS_SWITCH = "adapt_brightness_switch"
@@ -447,6 +455,7 @@ VALIDATION_TUPLES: list[tuple[str, Any, Any]] = [
     (CONF_INTERCEPT, DEFAULT_INTERCEPT, bool),
     (CONF_MULTI_LIGHT_INTERCEPT, DEFAULT_MULTI_LIGHT_INTERCEPT, bool),
     (CONF_INCLUDE_CONFIG_IN_ATTRIBUTES, DEFAULT_INCLUDE_CONFIG_IN_ATTRIBUTES, bool),
+    (CONF_EXPAND_LIGHT_GROUPS, DEFAULT_EXPAND_LIGHT_GROUPS, bool),
 ]
 
 
diff --git a/custom_components/adaptive_lighting/services.yaml b/custom_components/adaptive_lighting/services.yaml
index 23e8ceda..c95e31b5 100644
--- a/custom_components/adaptive_lighting/services.yaml
+++ b/custom_components/adaptive_lighting/services.yaml
@@ -139,6 +139,12 @@ change_switch_settings:
       example: false
       selector:
         boolean: null
+    expand_light_groups:
+      description: Expand light groups to their members (`true`, default). Set `false` to send commands to the group and track manual control for the group. Explicit member targets in services stay individual targets.
+      required: false
+      example: true
+      selector:
+        boolean: null
     separate_turn_on_commands:
       description: Use separate `light.turn_on` calls for color and brightness, needed for some light types. 🔀
       required: false
diff --git a/custom_components/adaptive_lighting/strings.json b/custom_components/adaptive_lighting/strings.json
index 6e07c69d..9e22ff57 100644
--- a/custom_components/adaptive_lighting/strings.json
+++ b/custom_components/adaptive_lighting/strings.json
@@ -78,7 +78,8 @@
               "skip_redundant_commands": "skip_redundant_commands: Skip sending adaptation commands whose target state already equals the light's known state. Minimizes network traffic and improves the adaptation responsivity in some situations. 📉Disable if physical light states get out of sync with HA's recorded state.",
               "intercept": "intercept: Intercept and adapt `light.turn_on` calls to enabling instantaneous color and brightness adaptation. 🏎️ Disable for lights that do not support `light.turn_on` with color and brightness.",
               "multi_light_intercept": "multi_light_intercept: Intercept and adapt `light.turn_on` calls that target multiple lights. ➗⚠️ This might result in splitting up a single `light.turn_on` call into multiple calls, e.g., when lights are in different switches. Requires `intercept` to be enabled.",
-              "include_config_in_attributes": "include_config_in_attributes: Show all options as attributes on the switch in Home Assistant when set to `true`. 📝"
+              "include_config_in_attributes": "include_config_in_attributes: Show all options as attributes on the switch in Home Assistant when set to `true`. 📝",
+              "expand_light_groups": "expand_light_groups: Expand light groups to their members (`true`, default). Set `false` to send commands to the group and track manual control for the group. Explicit member targets in services stay individual targets."
             },
             "data_description": {
               "initial_transition": "Duration of the first transition when lights turn from `off` to `on` in seconds. ⏲️",
@@ -211,6 +212,10 @@
           "description": "Whether to prefer RGB color adjustment over light color temperature when possible. 🌈",
           "name": "prefer_rgb_color"
         },
+        "expand_light_groups": {
+          "description": "Expand light groups to their members (`true`, default). Set `false` to send commands to the group and track manual control for the group. Explicit member targets in services stay individual targets.",
+          "name": "expand_light_groups"
+        },
         "separate_turn_on_commands": {
           "description": "Use separate `light.turn_on` calls for color and brightness, needed for some light types. 🔀",
           "name": "separate_turn_on_commands"
diff --git a/custom_components/adaptive_lighting/switch.py b/custom_components/adaptive_lighting/switch.py
index ab9273df..c85087a9 100644
--- a/custom_components/adaptive_lighting/switch.py
+++ b/custom_components/adaptive_lighting/switch.py
@@ -98,6 +98,7 @@ from .const import (
     CONF_BRIGHTNESS_MODE_TIME_DARK,
     CONF_BRIGHTNESS_MODE_TIME_LIGHT,
     CONF_DETECT_NON_HA_CHANGES,
+    CONF_EXPAND_LIGHT_GROUPS,
     CONF_INCLUDE_CONFIG_IN_ATTRIBUTES,
     CONF_INITIAL_TRANSITION,
     CONF_INTERCEPT,
@@ -252,14 +253,11 @@ def _switches_with_lights(
     if not loaded_switches:
         return []
 
-    all_check_lights = (
-        _expand_light_groups(hass, lights) if expand_light_groups else set(lights)
-    )
     switches: AdaptiveSwitches = []
     for switch in loaded_switches:
-        switch._expand_light_groups(hass=hass)
-        # Check if any of the lights are in the switch's lights
-        if set(switch.lights) & set(all_check_lights):
+        switch._expand_light_groups()
+        check_lights = switch._resolve_lights(lights) if expand_light_groups else lights
+        if set(switch.lights) & set(check_lights):
             switches.append(switch)
     return switches
 
@@ -422,7 +420,7 @@ async def handle_apply_service(hass: HomeAssistant, service_call: ServiceCall) -
     switches = _switches_from_service_call(hass, service_call)
     lights = data[CONF_LIGHTS]
     for switch in switches:
-        all_lights = switch.lights if not lights else _expand_light_groups(hass, lights)
+        all_lights = switch._resolve_lights(lights or None)
         switch.manager.lights.update(all_lights)
         for light in all_lights:
             if data[CONF_TURN_ON_LIGHTS] or is_on(hass, light):
@@ -457,7 +455,7 @@ async def handle_set_manual_control_service(
     switches = _switches_from_service_call(hass, service_call)
     lights = data[CONF_LIGHTS]
     for switch in switches:
-        all_lights = switch.lights if not lights else _expand_light_groups(hass, lights)
+        all_lights = switch._resolve_lights(lights or None)
         manual_attributes = manual_control_event_attribute_to_flags(
             data[CONF_MANUAL_CONTROL],
         )
@@ -626,17 +624,22 @@ def _expand_light_groups(
     hass: HomeAssistant,
     lights: list[str],
 ) -> list[str]:
+    """Resolve nested groups without changing another profile's tracked targets."""
     all_lights: set[str] = set()
-    manager = hass.data[DOMAIN][ATTR_ADAPTIVE_LIGHTING_MANAGER]
-    for light in lights:
+    pending = list(lights)
+    visited: set[str] = set()
+    while pending:
+        light = pending.pop()
+        if light in visited:
+            continue
+        visited.add(light)
         state = hass.states.get(light)
         if state is None:
             _LOGGER.debug("State of %s is None", light)
             all_lights.add(light)
         elif _is_light_group(state):
             group = state.attributes["entity_id"]
-            manager.lights.discard(light)
-            all_lights.update(group)
+            pending.extend(group)
             _LOGGER.debug("Expanded %s to %s", light, group)
         else:
             all_lights.add(light)
@@ -889,7 +892,8 @@ class AdaptiveSwitch(SwitchEntity, RestoreEntity):
 
         self._name = data[CONF_NAME]
         self._interval: timedelta = data[CONF_INTERVAL]
-        self.lights: list[str] = data[CONF_LIGHTS]
+        self._configured_lights: list[str] = list(data[CONF_LIGHTS])
+        self.lights: list[str] = []
 
         # backup data for use in change_switch_settings "configuration" CONF_USE_DEFAULTS
         self._config_backup = deepcopy(data)
@@ -990,6 +994,7 @@ class AdaptiveSwitch(SwitchEntity, RestoreEntity):
                 self._name,
             )
             self._multi_light_intercept = False
+        self._expand_light_groups_flag = data[CONF_EXPAND_LIGHT_GROUPS]
         self._expand_light_groups()  # updates manual control timers
         observer = get_astral_observer(self.hass)
 
@@ -1073,15 +1078,29 @@ class AdaptiveSwitch(SwitchEntity, RestoreEntity):
         """Remove the listeners upon removing the component."""
         self._remove_listeners()
 
-    def _expand_light_groups(self, hass: HomeAssistant | None = None) -> None:
-        hass = hass or self.hass
-        all_lights = _expand_light_groups(hass, self.lights)
+    def _resolve_lights(self, lights: list[str] | None = None) -> list[str]:
+        """Apply this profile's group policy, preserving explicit member targets."""
+        if lights is None:
+            lights = self._configured_lights
+        if self._expand_light_groups_flag:
+            return _expand_light_groups(self.hass, lights)
+        return sorted(set(lights))
+
+    def _expand_light_groups(self) -> None:
+        all_lights = self._resolve_lights()
+        removed = set(self.lights) - set(all_lights)
+        self.lights = all_lights
+        if removed:
+            # Other profiles may still own a retired member or group, even when off.
+            for entry in self.hass.data[DOMAIN].values():
+                if isinstance(entry, dict) and (switch := entry.get(SWITCH_DOMAIN)):
+                    removed.difference_update(switch._resolve_lights())
+            self.manager.remove_lights(*removed)
         self.manager.lights.update(all_lights)
         self.manager.set_auto_reset_manual_control_times(
             all_lights,
             self._auto_reset_manual_control_time,
         )
-        self.lights = list(all_lights)
 
     async def _setup_listeners(self, _: Event[NoEventData] | None = None) -> None:
         _LOGGER.debug("%s: Called '_setup_listeners'", self._name)
@@ -1521,6 +1540,7 @@ class AdaptiveSwitch(SwitchEntity, RestoreEntity):
             return
 
         if lights is None:
+            self._expand_light_groups()
             lights = self.lights
 
         on_lights = [light for light in lights if is_on(self.hass, light)]
@@ -1668,6 +1688,10 @@ class AdaptiveSwitch(SwitchEntity, RestoreEntity):
         if self._adapt_delay > 0:
             await asyncio.sleep(self._adapt_delay)
 
+        # Runtime settings may retire this profile's target while the event waits.
+        if entity_id not in self.lights:
+            return
+
         await self._update_attrs_and_maybe_adapt_lights(
             context=self.create_context("light_event", parent=event.context),
             lights=[entity_id],
@@ -1983,8 +2007,12 @@ class AdaptiveLightingManager:
                 if (
                     not switch.is_on
                     or not switch._intercept
-                    # Never adapt on light groups, because HA will make a separate light.turn_on
-                    or ((e := self.hass.states.get(entity_id)) and _is_light_group(e))
+                    # Never adapt on light groups when expanding, because HA will make a separate light.turn_on
+                    or (
+                        switch._expand_light_groups_flag
+                        and (e := self.hass.states.get(entity_id))
+                        and _is_light_group(e)
+                    )
                     # Prevent adaptation of TURN_ON calls when light is already on,
                     # and of TOGGLE calls when toggling off.
                     or self.hass.states.is_state(entity_id, STATE_ON)
@@ -2381,7 +2409,11 @@ class AdaptiveLightingManager:
                 delay,
             )
             self.reset(light)
-            switches = _switches_with_lights(self.hass, [light])
+            switches = _switches_with_lights(
+                self.hass,
+                [light],
+                expand_light_groups=False,
+            )
             for switch in switches:
                 if not switch.is_on:
                     continue
@@ -2572,6 +2604,30 @@ class AdaptiveLightingManager:
         if reset_manual_control:
             self._schedule_manual_control_state_update(*lights)
 
+    def remove_lights(self, *lights: str) -> None:
+        """Retire tracking and pending work for targets no profile owns anymore."""
+        self.reset(*lights)
+        for light in lights:
+            self.lights.discard(light)
+            self.clear_proactively_adapting(light)
+            if timer := self.transition_timers.pop(light, None):
+                timer.cancel()
+            if task := self.sleep_tasks.pop(light, None):
+                task.cancel()
+            for records in (
+                self.manual_control,
+                self.auto_reset_manual_control_times,
+                self.turn_on_event,
+                self.turn_off_event,
+                self.toggle_event,
+                self.on_to_off_event,
+                self.off_to_on_event,
+                self.turn_off_locks,
+                self.adaptation_tasks_brightness,
+                self.adaptation_tasks_color,
+            ):
+                records.pop(light, None)
+
     def _get_entity_list(self, service_data: ServiceData) -> list[str]:
         if ATTR_ENTITY_ID in service_data:
             return cv.ensure_list_csv(service_data[ATTR_ENTITY_ID])
@@ -2806,7 +2862,11 @@ class AdaptiveLightingManager:
                     )
                     return
 
-            switches = _switches_with_lights(self.hass, [entity_id])
+            switches = _switches_with_lights(
+                self.hass,
+                [entity_id],
+                expand_light_groups=False,
+            )
             for switch in switches:
                 if switch.is_on:
                     await switch._respond_to_off_to_on_event(
diff --git a/custom_components/adaptive_lighting/translations/de.json b/custom_components/adaptive_lighting/translations/de.json
index a03c238f..4885e753 100644
--- a/custom_components/adaptive_lighting/translations/de.json
+++ b/custom_components/adaptive_lighting/translations/de.json
@@ -68,7 +68,8 @@
               "skip_redundant_commands": "skip_redundant_commands: Überspringt das Senden von Anpassungsbefehlen, deren Zielzustand bereits mit dem bekannten Zustand der Leuchte übereinstimmt. Minimiert den Netzwerkverkehr und verbessert die Anpassungsreaktion in einigen Situationen. 📉 Deaktivieren, falls der physikalische Zustand der Lichter nicht mehr mit dem Zustand in HA übereinstimmt.",
               "intercept": "intercept: Abfangen und Anpassen von `light.turn_on`-Aufrufen, um eine sofortige Anpassung von Farbe und Helligkeit zu ermöglichen. 🏎️ Deaktivieren für Leuchten, die `light.turn_on` mit Farbe und Helligkeit nicht unterstützen.",
               "multi_light_intercept": "multi_light_intercept: Abfangen und Anpassen von `light.turn_on`-Aufrufen, die auf mehrere Lichter aufrufen. ➗⚠️ Dies kann dazu führen, dass ein einzelner `light.turn_on`-Aufruf in mehrere Aufrufe aufgeteilt wird, z.B. wenn Lichter in verschiedenen Schaltern sind. Erfordert, dass `intercept` aktiviert ist.",
-              "include_config_in_attributes": "include_config_in_attributes: Alle Optionen als Attribute auf dem Schalter im Home Assistant anzeigen, wenn auf `true` gesetzt. 📝"
+              "include_config_in_attributes": "include_config_in_attributes: Alle Optionen als Attribute auf dem Schalter im Home Assistant anzeigen, wenn auf `true` gesetzt. 📝",
+              "expand_light_groups": "expand_light_groups: Lichtgruppen auf einzelne Mitgliedsentitäten erweitern (`true`) oder die Gruppenentität direkt steuern (`false`)."
             },
             "data_description": {
               "initial_transition": "Dauer des ersten Übergangs, wenn das Licht von `off` auf `on` schaltet, in Sekunden. ⏲️",
@@ -88,7 +89,8 @@
               "brightness_mode_time_light": "(Wird ignoriert, wenn `brightness_mode='default'`) Die Dauer in Sekunden, um die Helligkeit nach/vor Sonnenaufgang/Sonnenuntergang hoch/runter zu fahren. 📈📉.",
               "autoreset_control_seconds": "Setzt die manuelle Steuerung nach einer bestimmten Anzahl von Sekunden automatisch zurück. Zum Deaktivieren auf 0 setzen. ⏲️",
               "send_split_delay": "Verzögerung (ms) zwischen `separate_turn_on_commands` für Leuchten, die keine gleichzeitige Einstellung von Helligkeit und Farbe unterstützen. ⏲️",
-              "adapt_delay": "Wartezeit (Sekunden) zwischen dem Einschalten des Lichts und der Anwendung der adaptiven Beleuchtung. Könnte helfen, Flackern zu vermeiden. ⏲️"
+              "adapt_delay": "Wartezeit (Sekunden) zwischen dem Einschalten des Lichts und der Anwendung der adaptiven Beleuchtung. Könnte helfen, Flackern zu vermeiden. ⏲️",
+              "expand_light_groups": "Wenn auf `false` gesetzt, werden Anpassungsbefehle direkt an die Gruppenentität gesendet und nicht an die einzelnen Mitglieder."
             }
           }
         }
diff --git a/custom_components/adaptive_lighting/translations/en.json b/custom_components/adaptive_lighting/translations/en.json
index 2f1a7085..cc589156 100644
--- a/custom_components/adaptive_lighting/translations/en.json
+++ b/custom_components/adaptive_lighting/translations/en.json
@@ -79,7 +79,8 @@
               "skip_redundant_commands": "skip_redundant_commands: Skip sending adaptation commands whose target state already equals the light's known state. Minimizes network traffic and improves the adaptation responsivity in some situations. 📉Disable if physical light states get out of sync with HA's recorded state.",
               "intercept": "intercept: Intercept and adapt `light.turn_on` calls to enabling instantaneous color and brightness adaptation. 🏎️ Disable for lights that do not support `light.turn_on` with color and brightness.",
               "multi_light_intercept": "multi_light_intercept: Intercept and adapt `light.turn_on` calls that target multiple lights. ➗⚠️ This might result in splitting up a single `light.turn_on` call into multiple calls, e.g., when lights are in different switches. Requires `intercept` to be enabled.",
-              "include_config_in_attributes": "include_config_in_attributes: Show all options as attributes on the switch in Home Assistant when set to `true`. 📝"
+              "include_config_in_attributes": "include_config_in_attributes: Show all options as attributes on the switch in Home Assistant when set to `true`. 📝",
+              "expand_light_groups": "expand_light_groups: Expand light groups to their members (`true`, default). Set `false` to send commands to the group and track manual control for the group. Explicit member targets in services stay individual targets."
             },
             "data_description": {
               "initial_transition": "Duration of the first transition when lights turn from `off` to `on` in seconds. ⏲️",
@@ -212,6 +213,10 @@
           "description": "Whether to prefer RGB color adjustment over light color temperature when possible. 🌈",
           "name": "prefer_rgb_color"
         },
+        "expand_light_groups": {
+          "description": "Expand light groups to their members (`true`, default). Set `false` to send commands to the group and track manual control for the group. Explicit member targets in services stay individual targets.",
+          "name": "expand_light_groups"
+        },
         "separate_turn_on_commands": {
           "description": "Use separate `light.turn_on` calls for color and brightness, needed for some light types. 🔀",
           "name": "separate_turn_on_commands"
diff --git a/docs/advanced/manual-control.md b/docs/advanced/manual-control.md
index dc099c57..4b0bfe51 100644
--- a/docs/advanced/manual-control.md
+++ b/docs/advanced/manual-control.md
@@ -20,6 +20,10 @@ This feature is available when `take_over_control` is enabled.
 Additionally, enabling `detect_non_ha_changes` allows Adaptive Lighting to detect all state changes, including those made outside of Home Assistant, by comparing the light's state to its previously used settings.
 The `adaptive_lighting.manual_control` event is fired when a light is marked as "manually controlled," allowing for integration with automations 🤖.
 
+With `expand_light_groups: false`, manual control belongs to the group. A direct member change cannot pause adaptation for only that member; use group-level manual control or enable expansion for individual tracking.
+Explicit member targets in Adaptive Lighting services stay individual targets and do not mark or command the whole group.
+Changing expansion at runtime discards tracking and pending adaptation for targets no longer used by any profile.
+
 The Adaptive Lighting switch exposes these read-only attributes for its lights:
 
 - `manual_control`: lights with any attribute marked as manually controlled.
diff --git a/docs/configuration.md b/docs/configuration.md
index 2a7402f0..afd05721 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -75,6 +75,7 @@ All configuration options are listed below with their default values. These opti
 | `intercept`                                 | Intercept and adapt `light.turn_on` calls to enabling instantaneous color and brightness adaptation. 🏎️ Disable for lights that do not support `light.turn_on` with color and brightness.                                                                                                                                                                                                     | `True`         | `bool`                                  |
 | `multi_light_intercept`                     | Intercept and adapt `light.turn_on` calls that target multiple lights. ➗⚠️ This might result in splitting up a single `light.turn_on` call into multiple calls, e.g., when lights are in different switches. Requires `intercept` to be enabled.                                                                                                                                             | `True`         | `bool`                                  |
 | `include_config_in_attributes`              | Show all options as attributes on the switch in Home Assistant when set to `true`. 📝                                                                                                                                                                                                                                                                                                         | `False`        | `bool`                                  |
+| `expand_light_groups`                       | Expand light groups to their members (`true`, default). Set `false` to send commands to the group and track manual control for the group. Explicit member targets in services stay individual targets.                                                                                                                                                                                        | `True`         | `bool`                                  |
 
 <!-- OUTPUT:END -->
 
diff --git a/tests/test_config_flow.py b/tests/test_config_flow.py
index 241bd5ae..addc460c 100644
--- a/tests/test_config_flow.py
+++ b/tests/test_config_flow.py
@@ -11,6 +11,7 @@ except ImportError:
     from voluptuous_serialize import convert as to_field_list
 from homeassistant.components.adaptive_lighting.const import (
     BASIC_OPTIONS,
+    CONF_EXPAND_LIGHT_GROUPS,
     CONF_INITIAL_TRANSITION,
     CONF_MANUAL_CONTROL_ON_EXTERNAL_TURN_ON,
     CONF_SUNRISE_TIME,
@@ -106,6 +107,7 @@ async def test_options(hass):
     # Build input with advanced options nested in "advanced" section
     advanced_data = ADVANCED_DATA.copy()
     advanced_data[CONF_INITIAL_TRANSITION] = 23
+    advanced_data[CONF_EXPAND_LIGHT_GROUPS] = False
     advanced_data[CONF_SUNRISE_TIME] = NONE_STR
     advanced_data[CONF_SUNSET_TIME] = NONE_STR
     basic_data = {**BASIC_DATA, "min_brightness": 12}
diff --git a/tests/test_switch.py b/tests/test_switch.py
index 1765fb5e..0b9129e3 100644
--- a/tests/test_switch.py
+++ b/tests/test_switch.py
@@ -37,6 +37,7 @@ from homeassistant.components.adaptive_lighting.const import (
     CONF_BRIGHTNESS_MODE_TIME_DARK,
     CONF_BRIGHTNESS_MODE_TIME_LIGHT,
     CONF_DETECT_NON_HA_CHANGES,
+    CONF_EXPAND_LIGHT_GROUPS,
     CONF_INITIAL_TRANSITION,
     CONF_MANUAL_CONTROL,
     CONF_MANUAL_CONTROL_ON_EXTERNAL_TURN_ON,
@@ -2301,7 +2302,8 @@ def test_attributes_have_changed():
 
 async def test_state_change_handlers(hass):
     """Test AdaptiveLightingManager's EVENT_STATE_CHANGED listener.
-    ======================
+    ===============
+
     Sequence of events:
     1. Transition from sleep mode to normal.
     2. Create simulated transition events for that adapt.
@@ -3824,6 +3826,407 @@ async def test_light_group(
         assert len(events) == 3
 
 
+def _track_adaptive_light_calls(hass, *, ours_only=True):
+    """Capture commands emitted by Adaptive Lighting at the HA service boundary."""
+    calls = []
+
+    def track(event):
+        if (
+            event.data["domain"] == LIGHT_DOMAIN
+            and event.data["service"] == SERVICE_TURN_ON
+            and (not ours_only or is_our_context(event.context))
+        ):
+            calls.append(event.data["service_data"])
+
+    hass.bus.async_listen(EVENT_CALL_SERVICE, track)
+    return calls
+
+
+async def _setup_group_switch(hass, **settings):
+    return await setup_switch(
+        hass,
+        {
+            CONF_LIGHTS: ["light.light_group"],
+            CONF_INITIAL_TRANSITION: 0,
+            CONF_TRANSITION: 0,
+            CONF_MIN_BRIGHTNESS: 50,
+            CONF_MAX_BRIGHTNESS: 50,
+            **settings,
+        },
+    )
+
+
+@pytest.mark.parametrize("intercept", [False, True])
+async def test_light_group_expand_disabled_off_to_on(hass, intercept, cleanup):
+    """Group adaptation reaches members through the group on both turn-on paths."""
+    await setup_lights(hass, with_group=True)
+    _, switch = await _setup_group_switch(
+        hass,
+        expand_light_groups=False,
+        intercept=intercept,
+    )
+    calls = _track_adaptive_light_calls(hass, ours_only=False)
+    await hass.services.async_call(
+        LIGHT_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "light.light_group"},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    await asyncio.gather(*switch.manager.adaptation_tasks)
+    # HA emits the original service event before the interceptor changes its data.
+    # The group forwards the injected values to its real member entities.
+    expected_target = (
+        ["light.light_4", "light.light_5"] if intercept else "light.light_group"
+    )
+    assert any(
+        call[ATTR_ENTITY_ID] == expected_target and call.get(ATTR_BRIGHTNESS) == 128
+        for call in calls
+    ), calls
+    for member in ["light.light_4", "light.light_5"]:
+        assert hass.states.get(member).attributes[ATTR_BRIGHTNESS] == 128
+
+    calls.clear()
+    await switch._async_update_at_interval_action()
+    await hass.async_block_till_done()
+    assert any(call[ATTR_ENTITY_ID] == "light.light_group" for call in calls)
+    await hass.services.async_call(
+        LIGHT_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "light.light_group", ATTR_BRIGHTNESS: 77},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    await switch._async_update_at_interval_action()
+    await hass.async_block_till_done()
+    assert hass.states.get(switch.entity_id).attributes["manual_control"] == [
+        "light.light_group",
+    ]
+    for member in ["light.light_4", "light.light_5"]:
+        assert hass.states.get(member).attributes[ATTR_BRIGHTNESS] == 77
+
+
+@pytest.mark.parametrize("expand", [False, True])
+@pytest.mark.parametrize("explicit_member", [False, True])
+async def test_group_apply_respects_target_policy(
+    hass,
+    expand,
+    explicit_member,
+    cleanup,
+):
+    """Apply obeys profile expansion without widening an explicit member request."""
+    await setup_lights(hass, with_group=True)
+    _, switch = await _setup_group_switch(hass, expand_light_groups=expand)
+    calls = _track_adaptive_light_calls(hass)
+    target = "light.light_4" if explicit_member else "light.light_group"
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_APPLY,
+        {
+            ATTR_ENTITY_ID: switch.entity_id,
+            CONF_LIGHTS: [target],
+            CONF_TURN_ON_LIGHTS: True,
+        },
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    expected = (
+        ["light.light_4"]
+        if explicit_member
+        else (["light.light_4", "light.light_5"] if expand else ["light.light_group"])
+    )
+    # HA also emits forwarded member calls; AL's own commands use a scalar target.
+    assert (
+        sorted(
+            {
+                call[ATTR_ENTITY_ID]
+                for call in calls
+                if isinstance(call[ATTR_ENTITY_ID], str)
+            },
+        )
+        == expected
+    )
+    assert hass.states.get("light.light_4").attributes[ATTR_BRIGHTNESS] == 128
+    assert hass.states.get("light.light_5").state == (
+        STATE_OFF if explicit_member else STATE_ON
+    )
+
+
+@pytest.mark.parametrize("expand", [False, True])
+async def test_group_manual_control_service(hass, expand, cleanup):
+    """Group lookup and manual service use the same target policy, including reset."""
+    await setup_lights(hass, with_group=True)
+    _, switch = await _setup_group_switch(hass, expand_light_groups=expand)
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_SET_MANUAL_CONTROL,
+        {CONF_LIGHTS: ["light.light_group"], CONF_MANUAL_CONTROL: True},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    expected = ["light.light_4", "light.light_5"] if expand else ["light.light_group"]
+    assert hass.states.get(switch.entity_id).attributes["manual_control"] == expected
+    for target in expected:
+        assert switch.manager.manual_control[target] == LightControlAttributes.ALL
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_SET_MANUAL_CONTROL,
+        {CONF_LIGHTS: ["light.light_group"], CONF_MANUAL_CONTROL: False},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    assert hass.states.get(switch.entity_id).attributes["manual_control"] == []
+
+
+@pytest.mark.parametrize("shared_member", [False, True])
+async def test_group_runtime_expansion_restores_targets(hass, shared_member, cleanup):
+    """Changing expansion back and forth restores groups and retires member timers."""
+    await setup_lights(hass, with_group=True)
+    _, switch = await _setup_group_switch(hass, autoreset_control_seconds=60)
+    if shared_member:
+        _, other = await _setup_group_switch(
+            hass,
+            name="member",
+            lights=["light.light_4"],
+            autoreset_control_seconds=60,
+        )
+        await other.async_turn_off()
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_APPLY,
+        {ATTR_ENTITY_ID: switch.entity_id, CONF_TURN_ON_LIGHTS: True},
+        blocking=True,
+    )
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_SET_MANUAL_CONTROL,
+        {
+            ATTR_ENTITY_ID: switch.entity_id,
+            CONF_LIGHTS: ["light.light_group"],
+            CONF_MANUAL_CONTROL: True,
+        },
+        blocking=True,
+    )
+    manager = switch.manager
+    old_timers = dict(manager.auto_reset_manual_control_timers)
+    assert len(old_timers) == 2
+    calls = _track_adaptive_light_calls(hass)
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_CHANGE_SWITCH_SETTINGS,
+        {ATTR_ENTITY_ID: switch.entity_id, CONF_EXPAND_LIGHT_GROUPS: False},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    assert switch.lights == ["light.light_group"]
+    retained = {"light.light_4"} if shared_member else set()
+    assert manager.lights == {"light.light_group"} | retained
+    assert set(manager.auto_reset_manual_control_timers) == retained
+    for light, timer in old_timers.items():
+        assert timer.is_running() == (light in retained)
+    assert (
+        manager.manual_control.get("light.light_5", LightControlAttributes.NONE)
+        == LightControlAttributes.NONE
+    )
+    assert any(call[ATTR_ENTITY_ID] == "light.light_group" for call in calls)
+    calls.clear()
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_CHANGE_SWITCH_SETTINGS,
+        {ATTR_ENTITY_ID: switch.entity_id, CONF_EXPAND_LIGHT_GROUPS: True},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    assert switch.lights == ["light.light_4", "light.light_5"]
+    assert manager.lights == {"light.light_4", "light.light_5"}
+    expected = (
+        ["light.light_5"] if shared_member else ["light.light_4", "light.light_5"]
+    )
+    assert sorted({call[ATTR_ENTITY_ID] for call in calls}) == expected
+    if shared_member:
+        assert manager.manual_control["light.light_4"] == LightControlAttributes.ALL
+
+
+@pytest.mark.parametrize("expand", [False, True])
+@pytest.mark.parametrize("shared_target", [False, True])
+async def test_group_runtime_change_retires_delayed_events(
+    hass,
+    expand,
+    shared_target,
+    cleanup,
+):
+    """Delayed reactive handlers must not command targets this profile retired."""
+    await setup_lights(hass, with_group=True)
+    _, switch = await _setup_group_switch(
+        hass,
+        expand_light_groups=expand,
+        adapt_delay=0.1234,
+    )
+    retired_targets = (
+        {"light.light_4", "light.light_5"} if expand else {"light.light_group"}
+    )
+    retained_target = "light.light_4" if expand else "light.light_group"
+    if shared_target:
+        _, other = await _setup_group_switch(
+            hass,
+            name="retained",
+            lights=[retained_target],
+            expand_light_groups=False,
+        )
+        await other.async_turn_off()
+
+    entered, release = asyncio.Event(), asyncio.Event()
+    original_sleep = asyncio.sleep
+    delayed_count = 0
+
+    async def controlled_sleep(delay, *args, **kwargs):
+        nonlocal delayed_count
+        if delay == 0.1234:
+            delayed_count += 1
+            if delayed_count == (2 if expand else 1):
+                entered.set()
+            await release.wait()
+        else:
+            await original_sleep(delay, *args, **kwargs)
+
+    calls = _track_adaptive_light_calls(hass)
+    with patch.object(asyncio, "sleep", controlled_sleep):
+        try:
+            await hass.services.async_call(
+                LIGHT_DOMAIN,
+                SERVICE_TURN_ON,
+                {ATTR_ENTITY_ID: "light.light_group"},
+                blocking=True,
+            )
+            await asyncio.wait_for(entered.wait(), timeout=2)
+            await hass.services.async_call(
+                DOMAIN,
+                SERVICE_CHANGE_SWITCH_SETTINGS,
+                {
+                    ATTR_ENTITY_ID: switch.entity_id,
+                    CONF_EXPAND_LIGHT_GROUPS: not expand,
+                },
+                blocking=True,
+            )
+            expected = (
+                ["light.light_group"] if expand else ["light.light_4", "light.light_5"]
+            )
+            assert switch.lights == expected
+            assert switch.manager.lights == set(expected) | (
+                {retained_target} if shared_target else set()
+            )
+            calls.clear()
+        finally:
+            release.set()
+            await hass.async_block_till_done()
+
+    retired_calls = [
+        call
+        for call in calls
+        if isinstance(call[ATTR_ENTITY_ID], str)
+        and call[ATTR_ENTITY_ID] in retired_targets
+    ]
+    assert (
+        not retired_calls
+    ), f"Retired reactive handlers issued commands: {retired_calls}"
+    for member in ["light.light_4", "light.light_5"]:
+        assert hass.states.get(member).attributes[ATTR_BRIGHTNESS] == 128
+
+
+@pytest.mark.parametrize("trigger", ["turn_on", "autoreset"])
+async def test_group_mixed_profiles_preserve_tracking(hass, trigger, cleanup):
+    """Expanding one profile must not remove another profile's group tracking."""
+    await setup_lights(hass, with_group=True)
+    _, proxy = await _setup_group_switch(
+        hass,
+        expand_light_groups=False,
+        autoreset_control_seconds=60,
+        detect_non_ha_changes=True,
+    )
+    _, expanded = await _setup_group_switch(
+        hass,
+        name="expanded",
+        min_brightness=70,
+        max_brightness=70,
+        detect_non_ha_changes=True,
+    )
+    calls = _track_adaptive_light_calls(hass)
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_APPLY,
+        {
+            ATTR_ENTITY_ID: expanded.entity_id,
+            CONF_LIGHTS: ["light.light_group"],
+            CONF_TURN_ON_LIGHTS: True,
+        },
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    assert "light.light_group" in proxy.manager.lights
+    calls.clear()
+    if trigger == "turn_on":
+        await hass.services.async_call(
+            LIGHT_DOMAIN,
+            SERVICE_TURN_OFF,
+            {ATTR_ENTITY_ID: "light.light_group"},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        await hass.services.async_call(
+            LIGHT_DOMAIN,
+            SERVICE_TURN_ON,
+            {ATTR_ENTITY_ID: "light.light_group"},
+            blocking=True,
+        )
+    else:
+        await hass.services.async_call(
+            DOMAIN,
+            SERVICE_SET_MANUAL_CONTROL,
+            {
+                ATTR_ENTITY_ID: proxy.entity_id,
+                CONF_LIGHTS: ["light.light_group"],
+                CONF_MANUAL_CONTROL: True,
+            },
+            blocking=True,
+        )
+        timer = proxy.manager.auto_reset_manual_control_timers["light.light_group"]
+        timer.delay = 0
+        timer.start()
+        await timer.task
+    await hass.async_block_till_done()
+    # Only the proxy profile may command the group; the expanded profile uses members.
+    assert {
+        call[ATTR_BRIGHTNESS]
+        for call in calls
+        if call[ATTR_ENTITY_ID] == "light.light_group" and ATTR_BRIGHTNESS in call
+    } == {128}
+
+
+async def test_nested_group_apply_targets_leaves(hass, cleanup):
+    """Default expansion reaches nested leaves without sending commands to subgroups."""
+    await setup_lights(hass, with_group=True)
+    hass.states.async_set(
+        "light.outer",
+        STATE_OFF,
+        {ATTR_ENTITY_ID: ["light.light_group", "light.light_3"]},
+    )
+    _, switch = await _setup_group_switch(hass, lights=["light.outer"])
+    calls = _track_adaptive_light_calls(hass)
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_APPLY,
+        {CONF_LIGHTS: ["light.outer"], CONF_TURN_ON_LIGHTS: True},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+    assert sorted({call[ATTR_ENTITY_ID] for call in calls}) == [
+        "light.light_3",
+        "light.light_4",
+        "light.light_5",
+    ]
+    assert switch.lights == ["light.light_3", "light.light_4", "light.light_5"]
+
+
 def _state_changed_event(entity_id: str, ts: float, context: Context) -> Event:
     return Event(
         EVENT_STATE_CHANGED,
@@ -3960,25 +4363,21 @@ async def test_just_turned_off_same_automation_context(hass, cleanup):
 
 
 async def test_just_turned_off_group_context_reuse_end_to_end(hass, cleanup):
-    """Drive the issue #1378 scenario through the real event bus listeners.
-
-    Unlike `test_just_turned_off_group_context_reuse`, which calls
-    `just_turned_off` directly, this test fires the service and state-changed
-    events on the bus. Light groups are normally expanded out of
-    `manager.lights`, but they can remain tracked in real setups (e.g., when a
-    group is nested inside another configured group or is unavailable during
-    setup), which is the configuration under which issue #1378 was reported.
-    """
+    """A tracked member turn-on explains a group's reused OFF context (#1378)."""
     await setup_lights(hass, with_group=True)
-    _, switch = await setup_switch(hass, {CONF_LIGHTS: ["light.light_group"]})
+    _, switch = await _setup_group_switch(
+        hass,
+        lights=["light.light_group", "light.light_4"],
+        expand_light_groups=False,
+        detect_non_ha_changes=True,
+    )
     await hass.async_block_till_done()
     manager = switch.manager
 
     group = "light.light_group"
     member = "light.light_4"
     assert member in manager.lights
-    # Simulate a setup in which the group entity itself remains tracked.
-    manager.lights.add(group)
+    assert group in manager.lights
 
     turn_off_context = Context()
     # The group was turned off...
@@ -4008,25 +4407,18 @@ async def test_just_turned_off_group_context_reuse_end_to_end(hass, cleanup):
     assert member in manager.turn_on_event
 
     # ...which turned the group back on, but HA reused the old turn_off context.
-    with patch.object(
-        AdaptiveSwitch,
-        "_respond_to_off_to_on_event",
-        AsyncMock(),
-    ) as respond:
-        hass.bus.async_fire(
-            EVENT_STATE_CHANGED,
-            {
-                "entity_id": group,
-                "old_state": State(group, STATE_OFF),
-                "new_state": State(group, STATE_ON),
-            },
-            context=turn_off_context,
-        )
-        await hass.async_block_till_done()
+    calls = _track_adaptive_light_calls(hass)
+    state = hass.states.get(group)
+    hass.states.async_set(group, STATE_ON, state.attributes, context=turn_off_context)
+    await hass.async_block_till_done()
 
-    # Adaptation must not have been cancelled as a polling artifact.
-    respond.assert_called_once()
-    assert respond.call_args[0][0] == group
+    # The real group command must survive polling-artifact detection.
+    assert any(
+        call[ATTR_ENTITY_ID] == group and call.get(ATTR_BRIGHTNESS) == 128
+        for call in calls
+    )
+    for entity_id in ["light.light_4", "light.light_5"]:
+        assert hass.states.get(entity_id).attributes[ATTR_BRIGHTNESS] == 128
 
 
 @pytest.mark.parametrize("brightness_mode", ["linear", "tanh"])