Higher Color Temperature Lamps May Not Appear Brighter
Higher Color Temperature Lamps May Not Appear Brighter
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色温较高的灯可能不会显得更亮
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
D. K. Tiller
中科院分区：
文献类型：
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作者：
Xin Hu;K. Houser;D. K. Tiller
摘要 这项研究检验了这样一种观点：在相同照度下，使用较高相关色温 (CCT) 灯照明的房间会比使用较低 CCT 灯照明的房间显得更亮。这一信念被许多照明工程师和照明设计师所持有，尽管它没有理论支持，并且在实验研究中得到了不同的支持。 Guth 和 Howett 的线性亮度模型以及 Nayatani 和 Hunt 的非线性颜色外观模型预测，较高 CCT 源将比较低 CCT 源显得更暗，尽管预测的亮度差异很小。我们报告了两个实验的结果来测试这些模型的预测。这两个实验都涉及两个相同并排的全尺寸房间的视觉比较。一间房间使用标称 CCT 为 3500K 的灯照明；另一个房间用标称 CCT 为 6500K 的灯照明。两个房间的所有其他光度特征均保持不变，并且房间的布置与典型办公家具的镜像相同。在第一个实验中，四十一名受试者使用强制选择调查工具来识别哪个房间看起来更亮。在第二个实验中，二十八名受试者使用调光调整任务来匹配两个房间的亮度。在这两个实验中均未发现 CCT 与感知的房间亮度之间存在任何关系。来自线性亮度模型、非线性颜色外观模型以及此处报告的心理物理学实验结果的证据表明，CCT 与内部亮度感知之间没有关系。尽管亮度感知与光源的光谱功率分布有关，但 CCT 的局限性太大，无法表征源颜色与感知亮度之间的关系。
Abstract This study examines the belief that rooms illuminated with higher correlated color temperature (CCT) lamps will appear brighter than rooms illuminated with lower CCT lamps at the same illuminance. This belief is held by many illuminating engineers and lighting designers, despite the fact that it is not supported by theory, and has received mixed support in experimental studies. The linear brightness models of Guth and Howett, and the nonlinear color appearance models of Nayatani and Hunt predict that higher CCT sources will appear dimmer than lower CCT sources, though the predicted brightness differences are small. We report results from two experiments to test the predictions of these models. Both experiments involved the visual comparison of two identical side-by-side full-scale rooms. One room was illuminated with lamps having a nominal CCT of 3500K; the other room was illuminated with lamps having a nominal CCT of 6500K. All other photometric characteristics of the two rooms were held constant and the rooms were identically furnished as mirror images with typical office furniture. In the first experiment forty-one subjects used a forced choice survey instrument to identify which room appeared brighter. In the second experiment twenty-eight subjects used a dimming adjustment task to match the brightness in the two rooms. No relationship was found between CCT and perceived room brightness in either experiment. Evidence from linear brightness models, nonlinear color appearance models, and the results of the psychophysical experiments reported here suggests that that there is no relationship between CCT and the perception of interior brightness. Although brightness perception is related to the spectral power distribution of an illuminant, CCT is too limited to characterize the relationship between source color and perceived brightness.