diff --git a/acrylic-art-code-nolib/acrylic-art-code-nolib.ino b/acrylic-art-code-nolib/acrylic-art-code-nolib.ino
index fe2d496..92673f5 100644
--- a/acrylic-art-code-nolib/acrylic-art-code-nolib.ino
+++ b/acrylic-art-code-nolib/acrylic-art-code-nolib.ino
@@ -14,7 +14,7 @@ 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;