The engine bulbs are 6 volts, but the tender bulb is 1.5V run off the PS-1 board for Directional lighting. You can leave the CV board to run the engine lights. Tender change to LED or a 16-18V bulb. Markers in tender also run off the PS-1 board at about 5-6V so you do need to add a resistor and diode if your going to run off track power like Lionel did. G
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