You cannot see light objects themselves, but you can see their effects on any patch and surface objects present in the axes containing the light. A number of functions create these objects, including surf , mesh , pcolor , fill , and fill3 as well as the surface and patch functions. You control lighting effects by setting various axes, light, patch, and surface object properties.
All properties have default values that generally produce desirable results.
However, you can achieve the specific effect you want by adjusting the values of these properties. An axes property that specifies the color of the background light in the scene, which has no direction and affects all objects uniformly. Ambient light effects occur only when there is a visible light object in the axes. AmbientStrength A patch and surface property that determines the intensity of the ambient component of the light reflected from the object. DiffuseStrength A patch and surface property that determines the intensity of the diffuse component of the light reflected from the object.