diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 36c6819..3348974 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -157,12 +157,12 @@ void lightEngine()
         //Serial.println("lon: pin" + (String)i + " = PWM(" + (String)tmp_pwm + ")");
         analogWrite(pins[i], tmp_pwm);
       }
-    } else {
+    } else { // light state is off
 
       if (current_bri[i] != 0)
       {
         in_transition = true;
-        current_bri[i] -= step_level[i] / BRI_MOD_STEPS_PER_SEC;
+        current_bri[i] += step_level[i] / BRI_MOD_STEPS_PER_SEC;
         if (current_bri[i] < 0)
         {
           current_bri[i] = 0;