diff --git a/Assets/Translations/en.json b/Assets/Translations/en.json
index 24dca05a72..3ef06922ce 100644
--- a/Assets/Translations/en.json
+++ b/Assets/Translations/en.json
@@ -1305,6 +1305,8 @@
       "fade-duration-label": "Fade duration",
       "lock-description": "Seconds of inactivity before the lock screen activates.",
       "lock-label": "Lock screen",
+      "lock-screen-off-description": "Seconds of inactivity before monitors are turned off while the lock screen is active. Set to 0 to disable.",
+      "lock-screen-off-label": "Turn off screen while locked",
       "resume-command-label": "Resume command",
       "screen-off-description": "Seconds of inactivity before monitors are turned off.",
       "screen-off-label": "Turn off screen",
diff --git a/Assets/settings-default.json b/Assets/settings-default.json
index 262d6a7604..bc550dc50d 100644
--- a/Assets/settings-default.json
+++ b/Assets/settings-default.json
@@ -544,6 +544,7 @@
     "screenOffTimeout": 600,
     "lockTimeout": 660,
     "suspendTimeout": 1800,
+    "lockScreenOffTimeout": 0,
     "fadeDuration": 5,
     "screenOffCommand": "",
     "lockCommand": "",
diff --git a/Commons/Settings.qml b/Commons/Settings.qml
index aecf878359..1b629c655e 100644
--- a/Commons/Settings.qml
+++ b/Commons/Settings.qml
@@ -789,6 +789,7 @@ Singleton {
       property int screenOffTimeout: 600    // seconds, 0 = disabled
       property int lockTimeout: 660         // seconds, 0 = disabled
       property int suspendTimeout: 1800     // seconds, 0 = disabled
+      property int lockScreenOffTimeout: 0  // seconds, 0 = disabled — turn off monitors while lock screen is active
       property int fadeDuration: 5       // seconds of fade-to-black before action fires
       property string screenOffCommand: ""
       property string lockCommand: ""
diff --git a/Modules/Panels/Settings/Tabs/Idle/BehaviorSubTab.qml b/Modules/Panels/Settings/Tabs/Idle/BehaviorSubTab.qml
index c26bb55774..77e2480cb2 100644
--- a/Modules/Panels/Settings/Tabs/Idle/BehaviorSubTab.qml
+++ b/Modules/Panels/Settings/Tabs/Idle/BehaviorSubTab.qml
@@ -127,6 +127,15 @@ ColumnLayout {
                                     }
     }
 
+    DefaultActionRow {
+      actionName: I18n.tr("panels.idle.lock-screen-off-label")
+      actionDescription: I18n.tr("panels.idle.lock-screen-off-description")
+      timeoutValue: Settings.data.idle.lockScreenOffTimeout
+      defaultValue: Settings.getDefaultValue("idle.lockScreenOffTimeout")
+      showSettings: false
+      onActionTimeoutChanged: val => Settings.data.idle.lockScreenOffTimeout = val
+    }
+
     DefaultActionRow {
       actionName: I18n.tr("common.suspend")
       actionDescription: I18n.tr("panels.idle.suspend-description")
@@ -172,6 +181,7 @@ ColumnLayout {
     property int defaultValue
     property string command
     property string resumeCommand
+    property bool showSettings: true
 
     signal actionTimeoutChanged(int newValue)
     signal actionCommandChanged(string newCmd)
@@ -189,11 +199,18 @@ ColumnLayout {
       onValueChanged: rowRoot.actionTimeoutChanged(value)
     }
 
-    NIconButton {
+    Item {
       Layout.alignment: Qt.AlignVCenter
-      icon: "settings"
-      tooltipText: I18n.tr("common.edit")
-      onClicked: root.openEdit(rowRoot.actionName, rowRoot.command, rowRoot.resumeCommand, rowRoot.actionCommandChanged, rowRoot.actionResumeCommandChanged)
+      implicitWidth: Style.toOdd(Style.baseWidgetSize * Style.uiScaleRatio)
+      implicitHeight: Style.toOdd(Style.baseWidgetSize * Style.uiScaleRatio)
+
+      NIconButton {
+        visible: rowRoot.showSettings
+        anchors.centerIn: parent
+        icon: "settings"
+        tooltipText: I18n.tr("common.edit")
+        onClicked: root.openEdit(rowRoot.actionName, rowRoot.command, rowRoot.resumeCommand, rowRoot.actionCommandChanged, rowRoot.actionResumeCommandChanged)
+      }
     }
   }
 }
diff --git a/Services/Power/IdleService.qml b/Services/Power/IdleService.qml
index 2978157e63..ae015f68dc 100644
--- a/Services/Power/IdleService.qml
+++ b/Services/Power/IdleService.qml
@@ -43,6 +43,7 @@ Singleton {
   property var _customMonitors: ({})
   property var _queuedStages: []
   property bool _screenOffActive: false
+  property var _lockScreenOffMonitor: null
 
   // Signals for external listeners (plugins, modules)
   signal screenOffRequested
@@ -199,6 +200,7 @@ Singleton {
       if (PanelService.lockScreen && !PanelService.lockScreen.active) {
         PanelService.lockScreen.active = true;
       }
+      _applyLockScreenOffMonitor();
       root.lockRequested();
     } else if (stage === "suspend") {
       if (Settings.data.idle.suspendCommand)
@@ -240,6 +242,61 @@ Singleton {
     function onCustomCommandsChanged() {
       root._applyCustomMonitors();
     }
+    function onLockScreenOffTimeoutChanged() {
+      if (PanelService.lockScreen && PanelService.lockScreen.active)
+        root._applyLockScreenOffMonitor();
+      else
+        root._destroyLockScreenOffMonitor();
+    }
+  }
+
+  // -------------------------------------------------------
+  // React to lock screen active state changes
+  Connections {
+    target: PanelService.lockScreen
+    function onActiveChanged() {
+      if (PanelService.lockScreen.active)
+        root._applyLockScreenOffMonitor();
+      else
+        root._destroyLockScreenOffMonitor();
+    }
+  }
+
+  function _applyLockScreenOffMonitor() {
+    _destroyLockScreenOffMonitor();
+    const t = Settings.data.idle.lockScreenOffTimeout;
+    if (!Settings.data.idle.enabled || t <= 0)
+      return;
+    try {
+      const qml = `
+        import Quickshell.Wayland
+        IdleMonitor { timeout: ${t} }
+      `;
+
+      const monitor = Qt.createQmlObject(qml, root, "IdleMonitor_lockScreenOff");
+      monitor.isIdleChanged.connect(function () {
+        if (monitor.isIdle) {
+          Logger.i("IdleService", "Lock-screen idle: turning off monitors");
+          CompositorService.turnOffMonitors();
+          root._screenOffActive = true;
+        } else {
+          root._restoreMonitors();
+        }
+      });
+      root._lockScreenOffMonitor = monitor;
+      root._monitorsCreated = true;
+      Logger.i("IdleService", "Lock-screen-off monitor created, timeout", t, "s");
+    } catch (e) {
+      Logger.w("IdleService", "Failed to create lock-screen-off monitor:", e);
+    }
+  }
+
+  function _destroyLockScreenOffMonitor() {
+    if (_lockScreenOffMonitor) {
+      _lockScreenOffMonitor.destroy();
+      root._lockScreenOffMonitor = null;
+      Logger.d("IdleService", "Lock-screen-off monitor destroyed");
+    }
   }
 
   function _applyTimeouts() {