The Ambient object contains the settings for the ambient light which illuminates all 3D objects in the scene the same amount in a diffuse manner.
The Directional object contains the settings for the directional light which illuminates all 3D objects in the scene from a certain angle. This light controls how shadows are cast. It can be used to simulate the sun in an open environment.
The Ambient object contains the settings for the ambient light which illuminates all 3D objects in the scene the same amount in a diffuse manner.