タスク照明の個人制御が知的生産性に与える影響に関する研究

概要

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In this study, office work productivity was evaluated by performance and fatigue. Experiments were conducted under Task and Ambient Lighting (TAL) system, to examine the effect of controlling illuminance level on work desk with task lights. Twelve male subjects were exposed in the experimental chamber conditioned at 25℃, 40%RH, and 700lx. Three conditions were compared, which were 700lx under Ambient Lighting system, 700lx under TAL system with controllable task lights, and 700lx under TAL system with uncontrollable task lights. When the subjects could not control the task lights, performance was significantly lower than that when they can control the task lights. Although there was no significant difference on the complaints of fatigue between controllable and uncontrollable task light, the correlation between fatigue and performance showed that 10% increase of complaints on fatigue might result in 6.5% decrease of performance. We also calculated the cost effectiveness of productivity in the case of this experiment. The cost effect increased by performance improvement was big because of the high personnel cost. The individual control system in the light environment was cost-effectiveness.
2006-05-30