diff --git a/cheetah/overlay/frameworks/base/core/res/res/values/config.xml b/cheetah/overlay/frameworks/base/core/res/res/values/config.xml
index 04e2cb3..889f348 100644
--- a/cheetah/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/cheetah/overlay/frameworks/base/core/res/res/values/config.xml
@@ -158,6 +158,11 @@
     <!-- Type of the udfps long press sensor. Empty if long press is not supported. -->
     <string name="config_dozeUdfpsLongPressSensorType" translatable="false">com.google.sensor.long_press</string>
 
+    <!-- How long it takes for the HW to start illuminating after the illumination is requested.
+      It takes 3 frames to enable the Local High-Brightness Mode (LHBM), which at 120 Hz screen
+      refresh rate equates to a 25 ms delay. -->
+    <integer name="config_udfps_illumination_transition_ms">25</integer>
+
     <!-- the number of the max cached processes in the system. -->
     <integer name="config_customizedMaxCachedProcesses">64</integer>
 
diff --git a/panther/overlay/frameworks/base/core/res/res/values/config.xml b/panther/overlay/frameworks/base/core/res/res/values/config.xml
index 7da20bf..4a29d5a 100644
--- a/panther/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/panther/overlay/frameworks/base/core/res/res/values/config.xml
@@ -157,6 +157,11 @@
     <!-- Type of the udfps long press sensor. Empty if long press is not supported. -->
     <string name="config_dozeUdfpsLongPressSensorType" translatable="false">com.google.sensor.long_press</string>
 
+    <!-- How long it takes for the HW to start illuminating after the illumination is requested.
+      It takes 3 frames to enable the Local High-Brightness Mode (LHBM), which at 90 Hz screen
+      refresh rate equates to a 34 ms delay. -->
+    <integer name="config_udfps_illumination_transition_ms">34</integer>
+
     <!-- the number of the max cached processes in the system. -->
     <integer name="config_customizedMaxCachedProcesses">64</integer>