Since the invention of the light bulb, natural darkness is becoming increasingly invaded by artificial light. Once, light was considered unconditionally as an entirely positive element: the more light the better. It increases safety and has a positive effect on our moods, but scientists are discovering that light also has a dark side as we are discovering its many unforeseen consequences.

Since the invention of the light bulb, natural darkness is becoming increasingly invaded by artificial light. Once, light was considered unconditionally as an entirely positive element: the more light the better. It increases safety and has a positive effect on our moods, but scientists are discovering that light also has a dark side as we are discovering its many unforeseen consequences.