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<https://discovery.ucl.ac.uk/id/eprint/10204586> <http://purl.org/dc/terms/title> "The effects of spectral power distribution with high melanopic efficiency on visual and atmosphere perceptions of offices"^^<http://www.w3.org/2001/XMLSchema#string> .
<https://discovery.ucl.ac.uk/id/eprint/10204586> <http://purl.org/ontology/bibo/abstract> "Recent investigations into the effects of spectral power distributions (SPD) have largely kept\r\nseparate the impact on the human’s circadian system from impressions of interior lighting.\r\nWhen daylight is insufficient, blue-enriched electric light sources are considered as an\r\nalternative to deliver a stronger stimulus to circadian system of occupants in offices. However,\r\nsuch light sources may not always be desired. At present, it is still not clear how to balance the\r\nnon-visual effects of light on circadian rhythm and user satisfaction of office lighting.\r\nTherefore, this research aims to explore the influences of SPD with high Melanopic Daylight\r\nEfficacy Ratio (M-DER) on visual and atmosphere perceptions in the context of Integrative\r\nLighting design for offices. Three objectives were proposed to achieve this aim. The first\r\nobjective seeks to test can cold white light sources be more acceptable if they have SPDs closer\r\nto the daylight. The second objective is to examine if increasing melanopic efficiency by\r\nshifting peak wavelength of blue primary affects visual and atmosphere perceptions. The third\r\nobjective is to explore how Duv affects atmosphere perceptions of office lit by SPDs with\r\nmelanopsin stimulating peak wavelengths.\r\nThree psychological experiments were conducted with a multi-channel LED lamp which can\r\nclosely resemble the SPD of daylight. The results suggest neither using SPD of daylight nor\r\nchanging Duv improve user satisfaction of electric lighting. Metameric approaches can\r\nincrease melanopic efficiency of SPD without significantly affecting visual and atmosphere\r\nperception, but the colour matching functions should be selected with care. There was evidence\r\nsuggesting melanopsin may play a role in colour vision. It is anticipated that these results will\r\nassist lighting designers and manufacturers in selecting the most beneficial light spectra for the\r\nhealth and well-being."^^<http://www.w3.org/2001/XMLSchema#string> .
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