signal point indicator lamp

例句：

1. 1.The signal point indicator lamp is used to indicate the presence of an emergency vehicle.
   信号点指示灯用于指示紧急车辆的存在。
2. 2.The new signal point indicator lamp has a brighter light and longer battery life.
   新款信号点指示灯的亮度更亮，电池寿命更长。
3. 3. The signal point indicator lamp was installed in the main entrance to alert pedestrians of any approaching vehicles.
   信号点指示灯安装在主入口处，用来警告行人任何接近的车辆。