diff --git a/color.php b/color.php
index 0e0fc74..18759de 100644
--- a/color.php
+++ b/color.php
@@ -22,6 +22,11 @@ if(!in_array($mode, ['s', 'y', 'f'])) {
 	$mode = 's';
 }
 
+$stromstoss = $_GET['stromstoss'];
+if(!$stromstoss==1) {
+        $stromstoss = 0;
+}
+
 $red = hexdec(substr($value, 0, 2));
 $green = hexdec(substr($value, 2, 2));
 $blue = hexdec(substr($value, 4, 2));
@@ -37,6 +42,12 @@ if(is_int($step)) {
 	echo "\n";
 }
 
+if($stromstoss==0) {
+	$red=$red;
+	$green=$green*200/255;
+	$blue=$blue*128/255;
+}
+
 echo $url . '5' . '%20' . $red . '%20' . $mode . "\n";
 echo http_response($ch, $url . '5' . '%20' . $red . '%20' . $mode);
 echo "\n";
diff --git a/index.html b/index.html
index 433eb07..9ce357d 100644
--- a/index.html
+++ b/index.html
@@ -62,6 +62,8 @@
 				<label for="mode-instant">Sofort</label>
 				<input id="mode-fade" name="mode" type="radio" value="f" checked="checked">
 				<label for="mode-fade">Geschmeidig</label><br />
+				<input id="mode-stromstoss" name="stromstoss" type="checkbox" value="1">
+				<label for="mode-stromstoss">Stromstoß</label><br />
 				<button type="submit" id="submit">Erhelle mich!</button>
 			</form>
 		</div>
@@ -88,7 +90,7 @@
 					values[data[i]['name']] = data[i]['value'];
 				};
 
-				$.get('color.php' ,{'value': values['color'], 'mode': values['mode'], 'fadestep': values['fadestep']});
+				$.get('color.php' ,{'value': values['color'], 'mode': values['mode'], 'fadestep': values['fadestep'], 'stromstoss': values['stromstoss']});
 			};
 			$('#changeLight').submit(callback);
 			$('#submit').on('click,enter', callback);