Task Lighting Effects on Office Worker Satisfaction and Performance, and Energy Efficiency
Task Lighting Effects on Office Worker Satisfaction and Performance, and Energy Efficiency
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任务照明对办公室工作人员满意度和绩效以及能源效率的影响
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Cara Duval
中科院分区：
文献类型：
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作者：
G. Newsham;C. Arsenault;J. Veitch;Anna Maria Tosco;Cara Duval
本文报道了在同一办公室实验室进行的两个实验。作为一个更大的实验的一部分，58名参与者在两种照明设计中的一种下工作了一天。第一个设计只使用天花板嵌入式抛物线灯具；第二个设计采用了相同的抛物线环境照明，增加了一个角臂任务灯。直到下午，参与者才可以控制照明，他们可以控制周围抛物线照明的调光；有任务照明的参与者也被允许移动手臂的位置。白天，参与者完成了各种模拟的办公室任务，并完成了一些关于情绪、满意度和不适的问卷调查。照明设计对问卷结果没有主要影响，然而，任务照明与某些任务的表现改善有关。有趣的是，提供任务灯并没有降低参与者对环境光输出的偏好。第二个实验，有31名参与者，跟进了最后一点。同样，环境照明由天花板凹陷的抛物面灯具提供，并为参与者提供任务灯。对于三种不同输出水平（0%，50%和95%）的两种任务灯类型（角臂和发光阴影），参与者使用调光器来选择他们喜欢的环境照明水平。增加任务照明确实减少了选择的环境光输出，但照明功率的减少很小，仅与任务灯消耗的功率大致相同。结果表明，参与者不会进一步调暗环境照明，因为他们更喜欢在非任务表面保持照明，并避免极端的亮度比。
Abstract This paper reports on two experiments conducted in the same office laboratory. As part of a larger experiment, 58 participants worked for a day under one of two lighting designs. The first design used ceiling-recessed parabolic luminaires only; the second design employed the same parabolic ambient lighting, with the addition of an angle-arm task light. Participants had no control over the lighting until the afternoon, when they were offered dimming control over the ambient parabolic lighting; participants with task lighting were also permitted to move the arm location. During the day participants performed a variety of simulated office tasks, as well as completing a number of questionnaires on mood, satisfaction, and discomfort. There was no main effect of lighting design on questionnaire outcomes, however, task lighting was associated with performance improvements on some tasks. Interestingly, provision of a task light did not lower participants' preferred ambient light output. The second experiment, with 31 participants, followed up on this final point. Again, ambient lighting was provided by ceiling-recessed, parabolic luminaires, and participants were provided with a task light. For two task light types (angle-arm and luminous shade) at three different levels of output (0 percent, 50 percent, and 95 percent), participants used a dimmer to select their preferred level of ambient lighting. Increasing task lighting did reduce chosen ambient light output, but the reduction in lighting power was small, and only about the same as the power drawn by the task light. Results suggested that participants did not dim ambient lighting further because they preferred to maintain illumination on nontask surfaces, and to avoid extreme luminance ratios.