The Tomar O Scale Switch Stand is internally lit using accessory voltage. The appropriate red/green aspect lamp is shown when connected to the switch position. These work directly with Ross, GarGraves and Atlas switches. The lantern area swivels with the switch point movement. The maximum voltage is 16 volts either AC or DC. We have found the fixed !2VDC supplies offered by Royz Trains give plenty of light and ensure a constant safe voltage.