The simplest pendant lamps run on just three ingredients—a cord, a plug, and a socket—along with a little bit of wiring know-how. To make creating a custom lighting fixture as easy as possible, we’ve done the hard part for you: Finding the best sources for the supplies. Our shopping guide covers all the basics, plus some decorative extras, like lightbulb cages and glass shades. All that’s left for you to do is mix and match your favorite parts to design a one-of-a-kind creation.