diff --git a/src/com/android/settings/notification/ZenModeVisEffectPreferenceController.java b/src/com/android/settings/notification/ZenModeVisEffectPreferenceController.java
index 89b953d6a5b..23723c5c779 100644
--- a/src/com/android/settings/notification/ZenModeVisEffectPreferenceController.java
+++ b/src/com/android/settings/notification/ZenModeVisEffectPreferenceController.java
@@ -16,6 +16,7 @@
 
 package com.android.settings.notification;
 
+import android.app.NotificationManager;
 import android.content.Context;
 import android.support.v7.preference.CheckBoxPreference;
 import android.support.v7.preference.Preference;
@@ -51,6 +52,10 @@ public class ZenModeVisEffectPreferenceController
 
     @Override
     public boolean isAvailable() {
+        if (mEffect == NotificationManager.Policy.SUPPRESSED_EFFECT_LIGHTS) {
+            return mContext.getResources()
+                    .getBoolean(com.android.internal.R.bool.config_intrusiveNotificationLed);
+        }
         return true;
     }
 
diff --git a/tests/robotests/src/com/android/settings/notification/ZenModeVisEffectPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/notification/ZenModeVisEffectPreferenceControllerTest.java
index a424491ab06..6ca04ba7c6f 100644
--- a/tests/robotests/src/com/android/settings/notification/ZenModeVisEffectPreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/notification/ZenModeVisEffectPreferenceControllerTest.java
@@ -17,9 +17,14 @@
 package com.android.settings.notification;
 
 import static android.app.NotificationManager.Policy.SUPPRESSED_EFFECT_BADGE;
+import static android.app.NotificationManager.Policy.SUPPRESSED_EFFECT_LIGHTS;
 import static android.app.NotificationManager.Policy.SUPPRESSED_EFFECT_NOTIFICATION_LIST;
 import static android.app.NotificationManager.Policy.SUPPRESSED_EFFECT_PEEK;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.ArgumentMatchers.nullable;
 import static org.mockito.Mockito.mock;
@@ -30,6 +35,7 @@ import static org.mockito.Mockito.when;
 
 import android.app.NotificationManager;
 import android.content.Context;
+import android.content.res.Resources;
 import android.support.v7.preference.CheckBoxPreference;
 import android.support.v7.preference.PreferenceScreen;
 
@@ -81,6 +87,27 @@ public class ZenModeVisEffectPreferenceControllerTest {
         mController.displayPreference(mScreen);
     }
 
+    @Test
+    public void isAvailable() {
+        // SUPPRESSED_EFFECT_PEEK is always available:
+        assertTrue(mController.isAvailable());
+
+        // SUPPRESSED_EFFECT_LIGHTS is only available if the device has an LED:
+        Context mockContext = mock(Context.class);
+        mController = new ZenModeVisEffectPreferenceController(mockContext, mock(Lifecycle.class),
+                PREF_KEY, SUPPRESSED_EFFECT_LIGHTS, PREF_METRICS, null);
+        Resources mockResources = mock(Resources.class);
+        when(mockContext.getResources()).thenReturn(mockResources);
+
+        when(mockResources.getBoolean(com.android.internal.R.bool.config_intrusiveNotificationLed))
+                .thenReturn(false); // no light
+        assertFalse(mController.isAvailable());
+
+        when(mockResources.getBoolean(com.android.internal.R.bool.config_intrusiveNotificationLed))
+                .thenReturn(true); // has light
+        assertTrue(mController.isAvailable());
+    }
+
     @Test
     public void updateState_notChecked() {
         when(mBackend.isVisualEffectSuppressed(SUPPRESSED_EFFECT_PEEK)).thenReturn(false);