diff --git a/cocos/rendering/custom/scene-culling.ts b/cocos/rendering/custom/scene-culling.ts
index 127074b8862..9d93284ff8f 100644
--- a/cocos/rendering/custom/scene-culling.ts
+++ b/cocos/rendering/custom/scene-culling.ts
@@ -821,7 +821,8 @@ export class LightResource {
         // Already added
         const existingLightID = this.lightIndex.get(light);
         if (existingLightID !== undefined) {
-            return existingLightID;
+            return existingLightID * this.elementSize;
+            // return existingLightID;
         }
 
         if (!this.lightBuffer) {