diff --git a/right/src/config_parser/parse_config.c b/right/src/config_parser/parse_config.c
index 86136fb..98e9608 100644
--- a/right/src/config_parser/parse_config.c
+++ b/right/src/config_parser/parse_config.c
@@ -5,6 +5,9 @@
 #include "config_globals.h"
 #include "macros.h"
 #include "usb_report_updater.h"
+#include "led_display.h"
+#include "slave_scheduler.h"
+#include "slave_drivers/is31fl3731_driver.h"
 
 static parser_error_t parseModuleConfiguration(config_buffer_t *buffer)
 {
@@ -59,10 +62,6 @@ parser_error_t ParseConfig(config_buffer_t *buffer)
     uint8_t alphanumericSegmentsBrightness = ReadUInt8(buffer);
     uint8_t keyBacklightBrightness = ReadUInt8(buffer);
 
-    (void)iconsAndLayerTextsBrightness;
-    (void)alphanumericSegmentsBrightness;
-    (void)keyBacklightBrightness;
-
     // Mouse kinetic properties
 
     uint8_t mouseMoveInitialSpeed = ReadUInt8(buffer);
@@ -138,6 +137,16 @@ parser_error_t ParseConfig(config_buffer_t *buffer)
     if (!ParserRunDry) {
         DoubleTapSwitchLayerTimeout = doubleTapSwitchLayerTimeout;
 
+        // Update LED brightnesses and reinitialize LED drivers
+
+        IconsAndLayerTextsBrightness = iconsAndLayerTextsBrightness;
+        AlphanumericSegmentsBrightness = alphanumericSegmentsBrightness;
+        KeyBacklightBrightness = keyBacklightBrightness;
+        Slaves[SlaveId_LeftLedDriver].isConnected = false;
+        Slaves[SlaveId_RightLedDriver].isConnected = false;
+
+        // Update mouse key speeds
+
         MouseMoveState.initialSpeed = mouseMoveInitialSpeed;
         MouseMoveState.acceleration = mouseMoveAcceleration;
         MouseMoveState.deceleratedSpeed = mouseMoveDeceleratedSpeed;
@@ -150,6 +159,8 @@ parser_error_t ParseConfig(config_buffer_t *buffer)
         MouseScrollState.baseSpeed = mouseScrollBaseSpeed;
         MouseScrollState.acceleratedSpeed = mouseScrollAcceleratedSpeed;
 
+        // Update counts
+
         AllKeymapsCount = keymapCount;
         AllMacrosCount = macroCount;
     }
diff --git a/right/src/led_display.c b/right/src/led_display.c
index 151dcb8..cb3d8c9 100644
--- a/right/src/led_display.c
+++ b/right/src/led_display.c
@@ -3,6 +3,9 @@
 #include "layer.h"
 #include "keymap.h"
 
+uint8_t IconsAndLayerTextsBrightness = 0xff;
+uint8_t AlphanumericSegmentsBrightness = 0xff;
+
 static const uint16_t capitalLetterToSegmentSet[] = {
     0b0000000011110111,
     0b0001001010001111,
@@ -69,13 +72,13 @@ void LedDisplay_SetText(uint8_t length, const char* text)
             allSegmentSets |= characterToSegmentSet(text[0]);
     }
 
-    LedDriverValues[LedDriverId_Left][11] = allSegmentSets & 0b00000001 ? LED_BRIGHTNESS_LEVEL : 0;
-    LedDriverValues[LedDriverId_Left][12] = allSegmentSets & 0b00000010 ? LED_BRIGHTNESS_LEVEL : 0;
+    LedDriverValues[LedDriverId_Left][11] = allSegmentSets & 0b00000001 ? AlphanumericSegmentsBrightness : 0;
+    LedDriverValues[LedDriverId_Left][12] = allSegmentSets & 0b00000010 ? AlphanumericSegmentsBrightness : 0;
     allSegmentSets >>= 2;
 
     for (uint8_t i = 24; i <= 136; i += 16) {
         for (uint8_t j = 0; j < 5; j++) {
-            LedDriverValues[LedDriverId_Left][i + j] = allSegmentSets & 1 << j ? LED_BRIGHTNESS_LEVEL : 0;
+            LedDriverValues[LedDriverId_Left][i + j] = allSegmentSets & 1 << j ? AlphanumericSegmentsBrightness : 0;
         }
         allSegmentSets >>= 5;
     }
@@ -94,11 +97,11 @@ void LedDisplay_SetLayer(uint8_t layerId)
     }
 
     if (layerId >= LayerId_Mod && layerId <= LayerId_Mouse) {
-        LedDriverValues[LedDriverId_Left][16 * layerId - 3] = LED_BRIGHTNESS_LEVEL;
+        LedDriverValues[LedDriverId_Left][16 * layerId - 3] = IconsAndLayerTextsBrightness;
     }
 }
 
 void LedDisplay_SetIcon(led_display_icon_t icon, bool isEnabled)
 {
-    LedDriverValues[LedDriverId_Left][8 + icon] = isEnabled ? LED_BRIGHTNESS_LEVEL : 0;
+    LedDriverValues[LedDriverId_Left][8 + icon] = isEnabled ? IconsAndLayerTextsBrightness : 0;
 }
diff --git a/right/src/led_display.h b/right/src/led_display.h
index 48c53cb..8e76c23 100644
--- a/right/src/led_display.h
+++ b/right/src/led_display.h
@@ -14,6 +14,11 @@
         LedDisplayIcon_Adaptive,
     } led_display_icon_t;
 
+// Variables:
+
+    extern uint8_t IconsAndLayerTextsBrightness;
+    extern uint8_t AlphanumericSegmentsBrightness;
+
 // Functions:
 
     void LedDisplay_SetText(uint8_t length, const char* text);
diff --git a/right/src/slave_drivers/is31fl3731_driver.c b/right/src/slave_drivers/is31fl3731_driver.c
index 6454892..aae060f 100644
--- a/right/src/slave_drivers/is31fl3731_driver.c
+++ b/right/src/slave_drivers/is31fl3731_driver.c
@@ -3,6 +3,7 @@
 #include "slave_scheduler.h"
 #include "led_display.h"
 
+uint8_t KeyBacklightBrightness = 0xff;
 uint8_t LedDriverValues[LED_DRIVER_MAX_COUNT][LED_DRIVER_LED_COUNT];
 
 static led_driver_state_t ledDriverStates[LED_DRIVER_MAX_COUNT] = {
@@ -70,7 +71,7 @@ void LedSlaveDriver_Init(uint8_t ledDriverId)
     led_driver_state_t *currentLedDriverState = ledDriverStates + ledDriverId;
     currentLedDriverState->phase = LedDriverPhase_SetFunctionFrame;
     currentLedDriverState->ledIndex = 0;
-    memset(LedDriverValues[ledDriverId], LED_BRIGHTNESS_LEVEL, LED_DRIVER_LED_COUNT);
+    memset(LedDriverValues[ledDriverId], KeyBacklightBrightness, LED_DRIVER_LED_COUNT);
 
     if (ledDriverId == LedDriverId_Left) {
         LedDisplay_SetIcon(LedDisplayIcon_CapsLock, false);
diff --git a/right/src/slave_drivers/is31fl3731_driver.h b/right/src/slave_drivers/is31fl3731_driver.h
index db97c43..8ae937a 100644
--- a/right/src/slave_drivers/is31fl3731_driver.h
+++ b/right/src/slave_drivers/is31fl3731_driver.h
@@ -12,7 +12,6 @@
     #define LED_CONTROL_REGISTERS_COMMAND_LENGTH 19
     #define PMW_REGISTER_UPDATE_CHUNK_SIZE 8
     #define PWM_REGISTER_BUFFER_LENGTH (1 + PMW_REGISTER_UPDATE_CHUNK_SIZE)
-    #define LED_BRIGHTNESS_LEVEL 0xff
 
     #define IS_ISO true
     #define ISO_KEY_LED_DRIVER_ID LedDriverId_Left
@@ -45,6 +44,7 @@
 
 // Variables:
 
+    extern uint8_t KeyBacklightBrightness;
     extern uint8_t LedDriverValues[LED_DRIVER_MAX_COUNT][LED_DRIVER_LED_COUNT];
 
 // Functions: