| Keywords |
Circadian rhythm ; Melatonin suppression ; Photoreception ; Light design |
| Abstract |
Human is characterized by changes in behavior that occurs regularly about a 24 hour cycle. It is called the circadian rhythm. Light exposure could modify this rhythm, and this rhythm is generally affected by the solar radiation. The built environment is where most people spend the major part of their lives in modern society. Illumination from electric lighting in the built environment is quite different from solar radiation in intensity, spectral content, and timing during the 24-hour daily period. So, circadian rhythm can be disturbed by electric lighting. The aim of this paper is to provide a systematic review of previous studies regarding circadian rhythm and light, and to identify the major elements for applying suitable light design. |