Place the lighting transformer near an available outlet as well as the wire running from the Puck light itself.
Run the wire to the transformer. You may want to tape the wire to the floor or other areas to hide it.
Plug the lighting wire into the port at the end of the transformer.
Plug the power cable attached to the other end of the transformer into the available power outlet.
Press the "Power" button on the transformer to turn the unit on and off.