I am trying to wire some low voltage puck lights. I'm confused as to how to wire them. The trasformer has a black and a white where the 120V goes in and 2 red wires where the 12V leaves. Are both the red wires hot? Is there no neutral? Since the puck lights have 2 wires coming off them, how do I connect them to the red wires? Please help.

In your case, wire nut one wire to one of the reds, and do the same with the other. It doesn't matter which wire goes to which.

So if I understand correctly, wire one of the puck wires to one red and the other puck wire to the other red? Or do I wire both puck wires to the same red.

You want to make a circuit. It is like one of the red wires is hot, and the other neutral. So a wire from the puck light must be connected to each one.

Good answers , from both of you:: Labman & Washington 1