Human Centric Lighting

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Human Centric Lighting (HCL) is a human-centered lighting concept for interiors that takes into account not only the visual but also the emotional and non-visual effects of light. Usually, HCL is understood to mean the adjustment of the lighting according to the natural course of daylight . In addition to the illuminance , the changing color temperature of the light is essential . The illuminance is reduced in the evening. With the HCL, the color spectrum of the light should change over the course of the day as with natural light: high blue components in the morning hours, warmer light at sunrise, increasing blue components at midday, decrease in blue components towards evening and high blue components with low illuminance after sunset (blue hour ). . The changing light has a direct effect on the synchronization of the biological clock and the release of the sleep hormone melatonin from the pineal gland via photosensitive ganglion cells containing melanopsin .

application

Lighting concepts based on human physiology are particularly relevant for people who frequently stay for long periods in rooms with little or no daylight and for shift workers . The DIN SPEC 67600 is this planning recommendations for work and non-work sites to complement other planning-relevant standards such as DIN EN 12464-1 or ASR A3.4. The target variables are the stabilization of the internal clock as well as the promotion of concentration, regeneration, mood and motivation. For the implementation of daylight-like lighting concepts, light management systems are used which continuously control the needs-based color temperature profile and the illuminance levels according to the respective specifications.

Web links

literature

Individual evidence

  1. ↑ Light management as future technology: The fifth sense of the eye and how we can use it. from the Fraunhofer Institute for Industrial Engineering IAO, accessed on February 2, 2020