Detailed insights in both visual effects and effects beyond vision due to manipulations in illuminance and correlated color temperature (CCT) are needed to optimize study protocols as well as to design light scenarios for practical applications. This study investigated temporal dynamics and interindividual variability in subjective evaluations of sensation, comfort and mood as well as subjective and objective measures of alertness, arousal and thermoregulation following abrupt transitions in illuminance and CCT separately in a mild cold environment. The effects could be uniquely attributed to changes in illuminance or CCT and no interaction effects of illuminance and CCT were found for any of these markers. Responses to the abrupt transitions in illuminance and CCT occurred always immediately and exclusively amongst the subjective measures. Most of these responses diminished over time within the 45 minute light manipulation. In this period, no responses were found for objective measures of vigilance, arousal and thermoregulation. Significant interindividual variability occurred only in the visual comfort evaluation in response to changes in the intensity of the light. The results indicate that the design of dynamic light scenarios that are beneficial for human alertness and vitality requires tailoring to the individual to create visually comfortable environments.

中文翻译：

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照度和CCT中突然的光线过渡会导致不同的时间动态和个体差异，从而产生感觉，舒适度和警觉性

需要通过对照度和相关色温（CCT）的操作来获得视觉效果和视觉以外效果的详细见解，以优化研究方案并设计实际应用的照明方案。这项研究调查了在温和的寒冷环境中，突然改变照度和CCT之后，对感觉，舒适度和情绪的主观评估中的时间动态和个体间差异，以及对警觉性，唤醒和体温调节的主观和客观测量。该影响可以唯一地归因于照度或CCT的变化，并且对于这些标记中的任何一个都没有发现照度和CCT的相互作用。照度和CCT突然变化的响应总是在主观措施中立即发生，并且完全是主观措施。在45分钟的光照操作中，大多数响应会随着时间的推移而减弱。在此期间，未发现任何有关警惕，唤醒和体温调节的客观措施。仅在视觉舒适度评估中，响应于光强度的变化，才出现显着的个体差异。结果表明，对人类机敏和活力有益的动态灯光场景的设计需要针对个人进行定制以创建视觉上舒适的环境。