Two wire power indicator monitors DC power and operates off DC power.  With DC power present a steady light is present.  With the loss of DC power the light is off.  This unit has been adapted for many applications requiring power monitoring. The unit comes with White LEDs but can be ordered in other colors.  The unit comes in a water tight lens enclosure with optical enhanced "fish eye" lenses.  The lens assembly or the the LED board can be ordered seperately.  The unit is available with pigtails or Wago connector.