diff --git a/data/index.html b/data/index.html
index caae964..7d87641 100644
--- a/data/index.html
+++ b/data/index.html
@@ -49,7 +49,7 @@
   </div>
 
   <div class="param_block">
-    LDR Schwelle [%]: <output id="out_ldr_shw" class="val_range">50</output> %
+    LDR Schwelle [lx]: <output id="out_ldr_shw" class="val_range">50</output> lx
     <div class="slider">
       <input type="range" class="regler" id="range_ldr_shw" data-output="out_ldr_shw" min="0" max="100" value="50">
     </div>
diff --git a/lib/httpserver/httpserver.cpp b/lib/httpserver/httpserver.cpp
index 925f061..8b6e3b3 100644
--- a/lib/httpserver/httpserver.cpp
+++ b/lib/httpserver/httpserver.cpp
@@ -76,7 +76,7 @@ void HTTPServer::start_apps() {
           logt("set_time_ldr = %d\n", arg(i).toInt());
         }
         else if (argName(i).equals("range_ldr_shw")) {
-          treppe->set_ldr_schwelle(arg(i).toInt(), VORGABE_PROZENT);
+          treppe->set_ldr_schwelle(arg(i).toInt(), VORGABE_12BIT);
           logt("set_ldr_schwelle = %d %\n", arg(i).toInt());
         }
 
diff --git a/lib/treppe/treppe.cpp b/lib/treppe/treppe.cpp
index 0328be8..1634c7e 100644
--- a/lib/treppe/treppe.cpp
+++ b/lib/treppe/treppe.cpp
@@ -177,7 +177,7 @@ float Treppe::read_ldr() {
   float ldr_ohm = 40.57*(3.3-voltage)/voltage;
   float ldr_value = 6526.6 / (ldr_ohm * ldr_ohm);
   #ifdef LDRDEBUG
-  Serial.printf("Ohm: %f lux: %f\n", ldr_ohm,ldr_value);
+  Serial.printf("Ohm: %f lux: %f Comp: %d\n", ldr_ohm,ldr_value, param.ldr_schwelle);
   #endif
   return ldr_value;
 }
@@ -186,8 +186,7 @@ bool Treppe::check_ldr() {
   static uint8_t active = 0;
 
 #ifdef LDRDEBUG
-  Serial.printf("R(LDR) = %f kOhm  %f lux\n", ldr_value, lux);
-  return true;
+  //return true;
 #endif
 
   // follow up: averaging over many samples?
@@ -273,11 +272,16 @@ void Treppe::task() {
       fsm_pend.anim_beendet = dimmer_tick(&dimmer_ldr, DIM_LDR);
     }
 
-    if (param_changed) {
-      param_changed = false;
-      param = param_pend;
-      save_param_to_eeprom();
-    }
+  }
+
+  if (fsm_outputs.status == ST_RUHEZUSTAND || 
+      fsm_outputs.status == ST_INAKTIV_LDR){
+        if (param_changed) {
+          param_changed = false;
+          param = param_pend;
+          save_param_to_eeprom();
+          Serial.printf("Parameter Change applied!\n");
+        }
   }
 
 #ifdef DEBUG_TIMING
@@ -378,7 +382,7 @@ void Treppe::set_ldr_schwelle(const uint16_t value,
     // ?!
     param_pend.ldr_schwelle = 10 * value / 100;
   } else if (vorgabe_typ == VORGABE_12BIT) {
-    // param_pend.ldr_schwelle = value;
+     param_pend.ldr_schwelle = value;
   }
   param_changed = true;
 
diff --git a/lib/treppe/treppe.h b/lib/treppe/treppe.h
index 70389cc..b19f8ef 100644
--- a/lib/treppe/treppe.h
+++ b/lib/treppe/treppe.h
@@ -5,8 +5,8 @@
 #include "PCA9685.h"
 #include <EEPROM.h>
 
-// #define LDRDEBUG  // comment in to override LDR measurement
-#define LDR_HYS 5 // Hysteresis for switching off FSM [lux]
+//#define LDRDEBUG  // comment in to override LDR measurement
+#define LDR_HYS 8 // Hysteresis for switching off FSM [lux]
 
 #define SENSOR_OBEN 16
 #define SENSOR_UNTEN 12
@@ -28,7 +28,7 @@ private:
     uint16_t time_per_stair = 300; // dimmtime per stair [ms]
     uint16_t idle_pwm_max = 100;
     uint16_t active_pwm = 2000;
-    uint16_t ldr_schwelle = 2; // activation value for FSM [lx]
+    uint16_t ldr_schwelle = 30; // activation value for FSM [lx]
   };
   stairway_param_t param;
   stairway_param_t param_pend; // zwischenspeicher änderungen