diff --git a/Arduino/CanGrow/CanGrow.ino b/Arduino/CanGrow/CanGrow.ino
index b6eddd6..807841d 100644
--- a/Arduino/CanGrow/CanGrow.ino
+++ b/Arduino/CanGrow/CanGrow.ino
@@ -77,12 +77,8 @@ void setup() {
   // PINsoilmoisture is always HIGH and gets LOW in moment of waterlevel measurement
   digitalWrite(PINsoilmoisture, LOW);
   
-  // set PWM frequency lower to avoid annoying noises
-  // in combination with 47uF at fan output, 220Hz is kinda sweetspot for a fan
-  // but i guess putting just a cap in parallel for voltage regulation isnt a good idea
-  // low pass filter or buck converter would be better
-  // 220Hz is note A3 btw. 
-  analogWriteFreq(220);
+  // set PWM frequency to 2.2KHz
+  analogWriteFreq(2200);
 
   // Start EEPROM
   EEPROM.begin(512);
@@ -229,7 +225,7 @@ void loop() {
     if(MaintenanceMode == true) {
       if((currentRuntime - MaintenanceStarted <= MaintenanceDuration * 1000 ) && (UseLEDrelais == false)) {
         // in case of being in Maintenance Mode , dimm the grow light when not a relais is used
-        setOutput(1, 20);
+        setOutput(1, 15);
       } else {
         MaintenanceMode = false;
       }