The DIALIGHT 554-1231-100 is a panel mount illuminated indicator switch, commonly used in industrial control panels and equipment. It is designed for rear panel mounting and incorporates a knurled flange nut for secure attachment. The switch utilizes an incandescent lamp for illumination and is constructed from 94V-0 plastic for enhanced fire safety. Barriers are available to separate switches and prevent accidental actuation. This component is suitable for applications requiring visual indication of status or process conditions.