You can select a light source in the following ways:

• Click the light source in the scene.
• In Schematic view, click the icon corresponding to the light source. All light sources initially appear at the same X, Y, and Z position in the scene (0, 0, 0). If you add two light sources, for example, you need to move one light source in order to see the other.
• Select a Light folder in the Channel Editor.
• Use the Prev and Next buttons to select the previous or next light source.