diff --git a/acrylic-art-code/acrylic-art-code.ino b/acrylic-art-code/acrylic-art-code.ino
index 5205a58..4652516 100644
--- a/acrylic-art-code/acrylic-art-code.ino
+++ b/acrylic-art-code/acrylic-art-code.ino
@@ -16,7 +16,7 @@ void loop() {
     //average += 256-log(256-analogRead(0) / 4) * (256 /5.55); // old linearization
 
     // linearization using resistance to lux relationship 
-    average += (1250000.0 * pow(1023 - analogRead(0), -1.4059) - 73) / 2.08;
+    average += map(1250000.0 * pow(1023-analogRead(0), -1.4059), 73, 339, 0, 128);
     delay(3);
   }
   average /= ss;
@@ -24,10 +24,10 @@ void loop() {
   if (oldavg == 0) {
     oldavg = average;
   }
-  digitalWrite(13, HIGH);
   if (oldavg != average) {
     Serial.print("Goal: ");
     Serial.println(average);
+    digitalWrite(13, HIGH);
   }
   while (oldavg < average) {
     oldavg += 1;