A field study of illuminance reduction
A field study of illuminance reduction
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DOI：
10.1016/j.enbuild.2005.09.005
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发表时间：
2006-06-01
影响因子：
6.7
通讯作者：
Boyce, PR
中科院分区：
文献类型：
--
作者：
Akashi, Y;Boyce, PR
许多办公室的照明水平远远高于办公室任务所需的照明水平。降低环境照度，同时保持任务照度，即任务环境照明，可以在不损害视觉性能的情况下节省能源。任务环境照明的一个缺点是房间看起来既暗又暗。保持亮度感知是任务环境照明成功的关键。为了检验亮度增强型任务环境照明在降低照度方面的实用性，在现代办公环境中进行了一项实地研究。这项研究考察了上班族对环境照度比初始照度低约三分之一的反应，以及两种旨在增强亮度感知的措施：相关性更高的色温灯(6500K)和闪光元素。调查显示，在最初的适应期之后，上班族普遍对较低水平的环境照明感到满意。他们确实增加了办公桌上任务照明的使用，但这对整体能源消耗几乎没有影响。在环境光线水平较低的办公室中，6500K灯有效地提高了人们对亮度的感知。在较长一段时间内，使用的闪光元素并没有显著改变员工对悲观情绪的看法。(C)2005 Elsevier B.V.保留所有权利。
Many offices are illuminated at levels much higher than necessary for office tasks. Lowering ambient illuminance, while maintaining task illuminance, i.e., task-ambient lighting, can save energy without impairing visual performance. A downside of task-ambient lighting is rooms appear dark and gloomy. Maintaining brightness perception is the key to success in task-ambient lighting. To examine the practicality of brightness-enhanced task-ambient lighting for illuminance reduction a field study was conducted in a modern office setting. This study examined office workers' responses to approximately one-third lower ambient illuminance than the initial illuminance and two measures designed to enhance brightness perception: higher correlated color temperature lamps (6500 K) and sparkle elements. Surveys showed that after an initial adaptation period, office workers were generally satisfied with the lower level of ambient lighting. They did increase their use of task lighting at their desks but this had little impact on overall energy consumption. The 6500 K lamp was effective at increasing perceptions of brightness in offices with the lower ambient light level. Over a longer period, the sparkle elements used did not significantly change workers' perceptions of gloom. (C) 2005 Elsevier B.V. All rights reserved.