Task illuminance is one of the most used parameters in office lighting design and is often used as a ‘single number criterion’ to verify that a lighting design meets the requirements. Although other parameters, such as wall luminance, are often highly correlated with task illuminance, not taking these explicitly into account means critical user criteria such as comfort and satisfaction are left to chance. In this study, we investigated the effect of varying desk illuminance(150 lux to 1500 lux) while keeping wall luminance constant, isolating the effects of illuminance on the desk and eye on office users’ overall perception of the space, their mental state and their performance (visual and cognitive). While both visual acuity (paper-based) and perceived brightness increased significantly with higher desk illuminance, the room’s attractiveness did not. Even though illuminance at the eye increased considerably with desk illuminance (from 118 lux to 796 lux), only minor effects were found on subjective alertness and cognitive performance. This suggests that focusing on horizontal task illuminance as a design parameter is appropriate in view of visual acuity but has little to no effect on the space’s attractiveness, nor on cognitive performance or mental state of the office worker.

中文翻译：

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梳理办公室照明：隔离工作照明对办公室工作人员的影响

任务照度是办公室照明设计中最常用的参数之一，通常用作“单一数字标准”来验证照明设计是否符合要求。尽管其他参数（例如墙壁亮度）通常与任务照度高度相关，但如果不明确考虑这些参数，则意味着关键的用户标准（例如舒适度和满意度）只能靠运气。在这项研究中，我们调查了改变桌面照度（150 lux 到 1500 lux）同时保持墙壁亮度不变的影响，隔离了桌面和眼睛的照度对办公用户对空间的整体感知、他们的精神状态和他们的影响。表现（视觉和认知）。虽然视敏度（基于纸张的）和感知亮度都随着桌面照度的增加而显着增加，房间的吸引力没有。尽管眼睛的照度随着桌面照度（从 118 勒克斯到 796 勒克斯）显着增加，但对主观警觉性和认知能力的影响很小。这表明，考虑到视力，将水平任务照度作为设计参数是合适的，但对空间的吸引力几乎没有影响，也不会对上班族的认知表现或精神状态产生影响。