diff --git a/sys/device_sys/light.go b/sys/device_sys/light.go
index 2d54fa1..a5de142 100644
--- a/sys/device_sys/light.go
+++ b/sys/device_sys/light.go
@@ -22,11 +22,7 @@ func (ls *LightSys) Update(w ecs.World) {
 		//灯当前状态,true-灯丝有电流，false-灯丝没有电流
 		state := component.BitStateType.Get(entry)
 		//驱动灯亮或灭
-		if drive.Td != state.Val {
-			state.Val = drive.Td
-		}
-		//故障设置
-		state.Val = state.Val && !ls.calculateFault(entry)
+		state.Val = drive.Td && !ls.calculateFault(entry)
 	})
 }
 func (ls *LightSys) calculateFault(entry *ecs.Entry) bool {