Vision is one of our most important human senses. We use sight to understand the environment, to move about, and to carry out tasks. Our vision also plays a major role in leisure activities and in our sense of well-being. Our ability to see depends upon the presence of light and the various effects light can produce. Being able to provide and to control light from natural and artificial light sources is therefore an important feature of the built environment and our comfort. Aspects of lighting science, such as measurement of light, are oriented towards human perceptions because they depend on the working of the human eye and other parts of the ‘visual system’. The following chapters apply this knowledge to lighting design using both artificial and natural lighting. Resource 3 at the end of the book has useful information that explains the physical nature of light and the operation of the eye and visual system.
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