diff --git a/firmware/20230514_firmware.ino.bin b/firmware/20230515_firmware.ino.bin
similarity index 67%
rename from firmware/20230514_firmware.ino.bin
rename to firmware/20230515_firmware.ino.bin
index 1ab9937..bf57f69 100644
Binary files a/firmware/20230514_firmware.ino.bin and b/firmware/20230515_firmware.ino.bin differ
diff --git a/firmware/20230515_firmware.spiffs.bin b/firmware/20230515_firmware.spiffs.bin
new file mode 100644
index 0000000..5df4f19
Binary files /dev/null and b/firmware/20230515_firmware.spiffs.bin differ
diff --git a/firmware/20230514_firmware_dev.ino.bin b/firmware/20230515_firmware_dev.ino.bin
similarity index 68%
rename from firmware/20230514_firmware_dev.ino.bin
rename to firmware/20230515_firmware_dev.ino.bin
index 0f0b57d..c67e205 100644
Binary files a/firmware/20230514_firmware_dev.ino.bin and b/firmware/20230515_firmware_dev.ino.bin differ
diff --git a/firmware/light_engine.ino b/firmware/light_engine.ino
index e77961d..8075d61 100644
--- a/firmware/light_engine.ino
+++ b/firmware/light_engine.ino
@@ -64,10 +64,9 @@ void lightEngine()
           //Serial.println("Reached target bri[" + (String)i + "] = " + (String)bri[i]);
         }
 
-        uint16_t tmp_pwm = calcPWM(current_bri[i]);
-        current_pwm[i] = tmp_pwm;
+        current_pwm[i] = calcPWM(current_bri[i]);
         //Serial.println("lon: pin" + (String)i + " = PWM(" + (String)tmp_pwm + ")");
-        analogWrite(pins[i], tmp_pwm);
+        analogWrite(pins[i], current_pwm[i]);
       }
     } else { // light state is off
 
@@ -82,10 +81,9 @@ void lightEngine()
           //Serial.println("Reached target bri[" + (String)i + "] = " + (String)bri[i]);
         }
 
-        uint16_t tmp_pwm = calcPWM(current_bri[i]);
-        current_pwm[i] = tmp_pwm;
+        current_pwm[i] = calcPWM(current_bri[i]);
         //Serial.println("loff: pin" + (String)i + " = PWM(" + (String)tmp_pwm + ")");
-        analogWrite(pins[i], tmp_pwm);
+        analogWrite(pins[i], current_pwm[i]);
       }
     }
 
diff --git a/firmware/timing_control.ino b/firmware/timing_control.ino
index e237c5b..1b1a5be 100644
--- a/firmware/timing_control.ino
+++ b/firmware/timing_control.ino
@@ -184,9 +184,9 @@ void tc_update_main()
     // disable the lights
     for (uint8_t i = 0; i < LIGHTS_COUNT; i++)
     {
+      light_state[i]    = false;
       bri[i]            = 0;
-      current_bri[i]    = 0;
-      current_pwm[i]    = 0;
+      current_bri[i]    = 4; // set it to a value which forces the light wngine to switch of the pwm signal pf the gpio
       transitiontime[i] = default_transitiontime;
       process_lightdata(i, transitiontime[i]);
     }
@@ -206,17 +206,19 @@ void tc_update_main()
 
   if (target_data_block >= NUMBER_OF_TIMER_DATA_BLOCKS)
   {
-    // we are not between two valid data points, do nothing
-    Serial.println("tdb is >= num data blocks, abort operation...");
+    // we are not between two valid data points
+    // we are at the last element of the data block list
+    Serial.println("tdb is beyond data blocks length, abort operation");
+
     for (uint8_t i = 0; i < LIGHTS_COUNT; i++)
     {
       light_state[i]    = false;
       bri[i]            = 0;
-      current_bri[i]    = 0;
-      current_pwm[i]    = 0;
+      current_bri[i]    = 4; // set it to a value which forces the light wngine to switch of the pwm signal pf the gpio
       transitiontime[i] = default_transitiontime;
       process_lightdata(i, transitiontime[i]);
     }
+
     target_data_block = 255;
     current_target_data_block = 255;
     return;