diff --git a/wled_client.py b/wled_client.py
index f6c23b9..23fdfc7 100644
--- a/wled_client.py
+++ b/wled_client.py
@@ -8,9 +8,11 @@ TIMEOUT = 5
 
 def build_wled_url(hostname, r, g, b, segment=None, effect=""):
     """Build WLED HTTP API URL."""
-    base = f"http://{hostname}/win&A=255&R={r}&G={g}&B={b}"
     if effect:
         base = f"http://{hostname}{effect}&R={r}&G={g}&B={b}"
+    else:
+        # FX=0 setzt den Effekt explizit zurueck auf "Solid"
+        base = f"http://{hostname}/win&A=255&FX=0&R={r}&G={g}&B={b}"
     if segment is not None:
         base = f"{base}&SS={segment}"
     return base