Lighting, both natural and manufactured, affects every moment of our lives.  From the quantity and quality of light we see, to the lighting products themselves, and even the type of light around us at night, proper light can directly contribute to a healthier, happier, and more productive life. 

Understanding light sources, and their impact on human health and performance is critical to the proper application of light.  This understanding begins with a perspective of human beings and our natural interaction with light in Nature, from sleep and wake cycles to color and quantity of light available in nature. 

In the long history of humanity on Earth, artificial light (electric light) has really only affected humans on a large scale for only a small period, just over 100 years.  Because it is such a new discipline, the proper application of light and the study of the affect of the light are very new to humanity.  Artificial lighting itself has changed dramatically in the last 20 years alone, so we must continually consider the affect these sources and technology have on our lives. 

While lighting is typically viewed as a utilitarian necessity, bad lighting can cause serious consequences.  Lighting is also viewed often simply as an energy consumer, not as a technology that enhances our lives.  Education of both end users and lighting practitioners/manufacturers is essential to maximize the benefits of this technology.  We must have an ongoing discussion of the available technology, the technology in development, and an acknowledgement that lighting is a critical part of our lives and that it must be applied while considering the light itself, it’s affect on the humans in the space, as well as the energy consumed, and it’s affect on the built and natural environments around us to benefit both people and our planet alike.