diff --git a/components/canvas/CLAUDE.md b/components/canvas/CLAUDE.md
index 5e7b444..f882a2d 100644
--- a/components/canvas/CLAUDE.md
+++ b/components/canvas/CLAUDE.md
@@ -109,6 +109,8 @@ Jede Edge bekommt einen `drop-shadow`-Filter entsprechend dem Quell-Node-Typ. Fa
 
 Compare-Node hat zusätzlich Handle-spezifische Farben (`left` → Blau, `right` → Smaragd).
 
+Im **Light Mode** wird der eigentliche Edge-`stroke` ebenfalls aus dieser Akzentfarbe abgeleitet und mit **50% Transparenz** gerendert (`rgba(..., 0.5)`), damit Linie und Glow farblich konsistent bleiben.
+
 ---
 
 ## Optimistic Updates & Local Persistence
diff --git a/lib/canvas-utils.ts b/lib/canvas-utils.ts
index 512a526..27d5efb 100644
--- a/lib/canvas-utils.ts
+++ b/lib/canvas-utils.ts
@@ -153,6 +153,17 @@ function sourceGlowFilterForNodeType(
   return `drop-shadow(0 0 3px rgba(${r},${g},${b},0.42)) drop-shadow(0 0 7px rgba(${r},${g},${b},0.2))`;
 }
 
+function sourceEdgeStrokeForNodeType(
+  type: string | undefined,
+  colorMode: EdgeGlowColorMode,
+): string | undefined {
+  if (colorMode !== "light" || !type) return undefined;
+  const rgb = SOURCE_NODE_GLOW_RGB[type];
+  if (!rgb) return undefined;
+  const [r, g, b] = rgb;
+  return `rgba(${r}, ${g}, ${b}, 0.5)`;
+}
+
 /** Wie convexEdgeToRF, setzt zusätzlich filter am Pfad nach Quell-Node-Typ. */
 export function convexEdgeToRFWithSourceGlow(
   edge: Doc<"edges">,
@@ -161,10 +172,16 @@ export function convexEdgeToRFWithSourceGlow(
 ): RFEdge {
   const base = convexEdgeToRF(edge);
   const filter = sourceGlowFilterForNodeType(sourceNodeType, colorMode);
-  if (!filter) return base;
+  const stroke = sourceEdgeStrokeForNodeType(sourceNodeType, colorMode);
+  if (!filter && !stroke) return base;
+
+  const style: NonNullable<RFEdge["style"]> = { ...(base.style ?? {}) };
+  if (filter) style.filter = filter;
+  if (stroke) style.stroke = stroke;
+
   return {
     ...base,
-    style: { ...(base.style ?? {}), filter },
+    style,
   };
 }