ABSTRACT Numerous efforts have been made to investigate how light source color rendition affects color preference. Though the effect of light level on color appearance (known as the Hunt effect) was found in 1952, most studies investigating color preference under light sources only employed a single illuminance level and the illuminance levels were typically between 200 and 1000 lux. This article reports two psychophysical experiments that were designed to investigate how light source color rendition affected color preference across a wide range of illuminance levels, from 20 to 15,000 lux. The observers compared the color appearance of an artwork under nine nearly metameric light stimuli with a correlated color temperature (CCT) of 3000 K at different illuminance levels. These light stimuli were carefully designed to have different abilities to enhance the chroma of red and green colors, so that they had different gamut areas R g (between 100 and 124 in Experiment 1 and between 99 and 117 in Experiment 2). It was found that the illuminance level significantly affected the observers’ judgments, with a light stimulus with a greater R g being preferred at a lower light level. The light stimuli with an R g beyond 100 were preferred at the light levels from 20 to 5000 lux, whereas those with an R g around 100 were preferred at very high light levels (i.e., 10,000 and 15,000 lux). This suggested that the preference to the stimuli with an R g beyond 100, as found in many past studies, was likely due to the relatively lower illuminance levels in comparison to the daylight illuminance levels. In addition, the calculations of the color attributes of the artwork under the preferred stimuli suggested that CIECAM02 may overestimate the effect of light level on color appearance, especially when the light level was very high, which merits further investigations.

中文翻译：

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从 20 到 15000 lux 产生首选颜色外观的色域大小的变化

摘要 为了研究光源颜色再现如何影响颜色偏好，已经做出了许多努力。尽管光照水平对颜色外观的影响（称为亨特效应）是在 1952 年发现的，但大多数调查光源下颜色偏好的研究仅采用单一照度水平，照度水平通常在 200 到 1000 勒克斯之间。本文报告了两个心理物理学实验，旨在研究光源颜色再现如何影响从 20 到 15,000 勒克斯的各种照度水平的颜色偏好。观察者比较了艺术品在九种近同色异谱光刺激下的颜色外观，相关色温 (CCT) 为 3000 K，不同照度水平。这些光刺激经过精心设计，具有不同的增强红色和绿色色度的能力，因此它们具有不同的色域区域 R g （实验 1 中的 100 到 124 之间，实验 2 中的 99 到 117 之间）。研究发现，照度水平显着影响观察者的判断，在较低的光照水平下首选具有较大 R g 的光刺激。R g 超过 100 的光刺激在 20 到 5000 勒克斯的光级下是首选，而 R g 大约 100 的光刺激在非常高的光级（即 10,000 和 15,000 勒克斯）下是首选。这表明，在过去的许多研究中发现，偏爱 R g 超过 100 的刺激可能是由于与日光照度水平相比照度水平相对较低。此外，