I need to wire several driveway light posts in a row on a single switch. I am using underground wiring to the posts and romex inside the posts to the light fixture. How do I wire the lights?

You wire them like any other lights wired together. In a case like this it's pretty much black to black and white to white.


BTW, you cannot use indoor romex (NM-B) outdoors. You must use UF cable and it must be protected from physical damage where exposed to it.