tailieunhanh - Lighting with Artificial Light 19

Light and dark, hot and cold or the cyclical change of the seasons: the rotation and inclination of the Earth give rise to constantly recurring changes that, in the course of evolution, have resulted in human beings developing a circadian system – a system of internal clocks that anticipate such changes. Like the complex movement of a clock, it controls and coordinates the 24-hour variation of all bodily functions. | 19 Impact of Light on Human Beings 19 _ Impact of Light on Human Beings Contents Cover The brain synchronises our internal clock with the outside world. One of the cues it uses is light. 01 Biologically effective lighting provides a needs-based supplement to incident daylight. 02 Particularly important during the dark months of the year biologically effective lighting helps compensate for the weaker daylight stimulus indoors. 3 5 6 11 15 16 20 24 26 29 30 32 Editorial Human evolution is shaped by light Biological rhythms Our internal clock Biologically effective light Biologically effective light indoors Light therapy Lighting design Lighting quality and energy efficiency Practical example Dynamic office lighting Practical example Dynamic industrial workplace lighting Practical example Dynamic school lighting 34 Practical example Dynamic retirement home lighting 37 Practical example Dynamic domestic lighting 38 Lamp spectra 40 Outlook Research intensifying 42 Glossary 44 Standards literature 46 publications 47 Imprint and acknowledgments for photographs Editorial Light and dark hot and cold or the cyclical change of the seasons the rotation and inclination of the Earth give rise to constantly recurring changes that in the course of evolution have resulted in human beings developing a circadian system - a system of internal clocks that anticipate such changes. Like the complex movement of a clock it controls and coordinates the 24-hour variation of all bodily functions. Disrupting it can have a variety of negative effects producing symptoms of disorders such as depression or immune disease. Scientists have been studying the biological impacts of light perceived by the human eye since as long ago as the 1980s. But it was not until 2002 that they discovered ganglion cells in the retina of mammals that are not used for seeing . The newly identified cells respond most sensitively to visible blue light and set the master clock

• Điện - Điện tử
• maintained illuminance
• lighting technology
• luminance
• electrical characteristics
• lighting systems
• Luminaires