diff --git a/light/Light.cpp b/light/Light.cpp
index ed5fc1e..76d4258 100644
--- a/light/Light.cpp
+++ b/light/Light.cpp
@@ -27,9 +27,7 @@
 
 #define BREATH              "breath"
 #define BRIGHTNESS          "brightness"
-
-#define MAX_LED_BRIGHTNESS    255
-#define MAX_LCD_BRIGHTNESS    4095
+#define MAX_BRIGHTNESS      "max_brightness"
 
 namespace {
 /*
@@ -50,6 +48,22 @@ static void set(std::string path, int value) {
     set(path, std::to_string(value));
 }
 
+/*
+ * Read max brightness from path and close file.
+ */
+static int getMaxBrightness(std::string path) {
+    std::ifstream file(path);
+    int value;
+
+    if (!file.is_open()) {
+        ALOGW("failed to read from %s", path.c_str());
+        return 0;
+    }
+
+    file >> value;
+    return value;
+}
+
 static uint32_t getBrightness(const LightState& state) {
     uint32_t alpha, red, green, blue;
 
@@ -84,12 +98,12 @@ static inline uint32_t getScaledBrightness(const LightState& state, uint32_t max
 }
 
 static void handleBacklight(const LightState& state) {
-    uint32_t brightness = getScaledBrightness(state, MAX_LCD_BRIGHTNESS);
+    uint32_t brightness = getScaledBrightness(state, getMaxBrightness(PANEL_LED MAX_BRIGHTNESS));
     set(PANEL_LED BRIGHTNESS, brightness);
 }
 
 static void handleNotification(const LightState& state) {
-    uint32_t notificationBrightness = getScaledBrightness(state, MAX_LED_BRIGHTNESS);
+    uint32_t notificationBrightness = getScaledBrightness(state, getMaxBrightness(NOTIFICATION_LED MAX_BRIGHTNESS));
 
     /* Disable breathing or blinking */
     set(NOTIFICATION_LED BREATH, 0);