AN EXPERIMENTAL STUDY OF THE LIGHTING FOR NONE NATURAL LIGHT OFFICE SPACE BASED ON NON-VISUAL BIOLOGICAL EFFECTS

摘要

Lighting environment of office space is not only related to the visual effects for office workers, but also has influence on sleep, mood, and alertness and then has an important effect on physical and mental health of the staff through the non-visual forming system. Two lighting modes in a simulate office space without daylight were used to quantified high-intensity blue-enriched-white light's effects on human melatonin, cognitive ability, brain Electricity, alertness and other physiological factors. The results show that a significant difference exits in the melatonin content of saliva under basic lighting mode (300lx illuminance of the horizontal working plane and 4000K) and circadian lighting mode (eye illumination 1000 lx, 12000K). However, melatonin secretion is not sufficiently suppressed by the artificial circadian lighting stimulate from 9:00am to 11:00am. Significant differences could not be found in both visual performance and cognitive performance. The circadian lighting causes a certain degree of glare and results visual fatigue increasing.