Create an accent light

Select the objects to illuminate.
Press the L key (or select Appearance > Accent Lights) to open the Accent Lights interface.
Click the Create button and select Selective Spot Light (a directional cone of light) or Selective Point Light (a sphere of light).
An accent light with default properties is created and automatically placed above and to the right of the objects being illuminated, based on the current view.
The accent light is represented in the scene by a 3D icon, called a “grip,” which represents the type of light created. The grip shows the position and orientation of the accent light, and can be selected like other objects in the scene for editing and transformations.