Once you have the lights, you need to shoot them with the right settings. To bring out their inner bokeh, you have to keep them out of focus, so make them the background element in your shot.

A prime (fixed focal length) lens with a wide aperture of f/1.8 will produce superior bokeh to a zoom lens with an aperture of f/5.6. The iPhone uses prime lenses, with up to three on the back of ...