diff --git a/build-number.txt b/build-number.txt
index 10b0c0d..2681747 100644
--- a/build-number.txt
+++ b/build-number.txt
@@ -1 +1 @@
-264
+277
diff --git a/src/light_sensor.c b/src/light_sensor.c
index 0a0cba1..e12a355 100644
--- a/src/light_sensor.c
+++ b/src/light_sensor.c
@@ -67,19 +67,18 @@ void LightSensor_Poll(void)
         unsigned int measurement = LightSensor_Measurement;
         LightSensor_NewMeasurement = false;
         float brightness = 1.0f - measurement / 65535.0f;
-
-        if(measurement != 65535 && brightness < LightSensor_MinimumBrightness)
-        {
-            LightSensor_MinimumBrightness = brightness;
-        }
-        if(brightness > LightSensor_MaximumBrightness)
-        {
-            LightSensor_MaximumBrightness = brightness;
-        }
-
         LightSensor_AbsoluteBrightness = LIGHTSENSOR_LAMBDA * LightSensor_AbsoluteBrightness
             + (1.0f - LIGHTSENSOR_LAMBDA) * brightness;
 
+        if(LightSensor_AbsoluteBrightness < LightSensor_MinimumBrightness)
+        {
+            LightSensor_MinimumBrightness = LightSensor_AbsoluteBrightness;
+        }
+        if(LightSensor_AbsoluteBrightness > LightSensor_MaximumBrightness)
+        {
+            LightSensor_MaximumBrightness = LightSensor_AbsoluteBrightness;
+        }
+
         // Scale and saturate to get relative brightness value
         float range = LightSensor_MaximumBrightness
             - LightSensor_MinimumBrightness;