In modern life, artificial light is pervasive. A lack of natural darkness not only stops city dwellers from seeing the stars, it can cause real harm to both the environment and human health. Scientists refer to the overabundance of artificial light from street lights, billboards, and store windows as “light pollution”, and that flood of manmade light is increasing by an estimated 5% to 7% every year. Artificial light disturbs plant growth cycles, migration patterns, and kills billions of ecologically-important insects each year. Not to mention the adverse affects on humans’ sleep cycles. It falls into the hands of building designers, owners, and architects to create spaces that respect nature’s need for darkness.