 While light always remains in itself identical, its proximity or distance from the Light of Lights determines the ontic light reality of all beings. Their ontological statuses, qualities and influences are determined by the different degrees of intensity of light. The distinguishing characteristic is the scale of lights coming into being through the radiance of light: the greater its radiance, the greater its ontological perfection. Reality proceeds from the Light of Lights and unfolds via the First Light and all the subsequent dominating and managing lights whose exponential interactions bring about the existence of all existents. As each new light interacts with other existing lights, more light and dark substances are generated. Light produces both immaterial and substantial lights, such as immaterial intellects (angels), human and animal souls. Light produces dusky substances, such as bodies. In fact, light generates both luminous accidents, such as those in immaterial lights, physical lights or rays, and dark accidents, whether it be in immaterial lights or in bodies (PI, §§109–10). 