The theme of this book is that light is an inseparable part of architectural design, and is intended to provide students of architecture and interior design with a graphic guideline to the fundamental role lighting plays in this process. While simple light sources may be enough to satisfy practical needs, the design process must expand beyond basic illumination. The challenge for architects and designers is the creation of luminous environments offering visual interest and a sense of well-being, while also meeting basic seeing needs. Technological advances provide opportunities for the lighting designer's creative introduction of light, and the visual and psychological perceptions of the illuminated architectural environment.