This options reverse polarity to a lamp, while using the same power source. It uses a relay for the swap, based on the logic input. When the relay is triggered, the -/+ to the lamp swap. It appears to work (zoomed in on the lamp to see the directions of the dots on the wires, or the direction of the arrow by the lamp) but the power behind it severely weakens, for instance if you change the voltage to the same rating as the lamp, i.e. 9v for 9v, the lamp isn't much powered. - nforystek
