This study was conducted to verify how the illuminance and correlated color temperature of LED lighting affect working memory. For this study, an automatic LED lighting device based on a light sensor was developed and used, and the lighting conditions were treated with a total of six conditions (2 × 3): two illuminance conditions (dim: 400 lx, bright: 1,000 lx) and three correlated color temperature conditions (3,000 K, 5,000 K, and 7,000 K). There were 30 participants in the study, and the average age was 21.6 years (Standard deviation = 1.92). Participants were assigned to all six lighting conditions, and the placement order was randomized. For the measurement of working memory, 3-back task was used and the correct responses for 5 minutes were used as a dependent variable. As a result of repeated measures analysis of variance (ANOVA), both illuminance and correlated color temperature were found to be significant variables affecting working memory, and no interaction effect between illuminance and correlated color temperature was found. As a result of the post hoc verification conducted thereafter, the working memory performance in the bright light condition (1,000 lx) was 48.32 (Standard deviation = 15.63) on average, compared to 44.80 (Standard deviation = 15.29) in the relatively dim condition (400 lx). It was found that the condition of bright light was superior in performing working memory compared to relatively dim condition. The working memory performance in the correlated color temperature condition (5,000 K) was 48.32 (Standard deviation = 16.41) on average and higher than that of other color temperature conditions. As a result, working memory performance was the best in 1,000 lx, 5,000 K condition Mean = 53.43 (Standard deviation = 18.38), and 400 lx, 7,000 K condition Mean = 42.73 (Standard deviation = 17.68) showed the worst performance of working memory.

中文翻译：

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LED照明照度及相关色温对工作记忆的影响

进行这项研究是为了验证LED照明的照度和相关色温如何影响工作记忆。在本研究中，开发并使用了基于光传感器的自动LED照明设备，并以总共六个条件（2×3）处理照明条件：两个照度条件（暗淡：400 lx，明亮：1,000 lx） ）和三个相关的色温条件（3,000 K，5,000 K和7,000 K）。研究共有30名参与者，平均年龄为21.6岁（标准差= 1.92）。参与者被分配到所有六个照明条件，并且放置顺序是随机的。对于工作记忆的测量，使用了3后任务，并且将5分钟内的正确响应用作因变量。作为重复测量方差分析（ANOVA）的结果，发现照度和相关色温都是影响工作记忆的重要变量，并且未发现照度和相关色温之间有相互作用。此后进行事后验证的结果是，在相对较暗的条件下，在强光条件下（1,000 lx）的工作记忆性能平均为48.32（标准差= 15.63），而在相对昏暗的条件下（44.80（标准差= 15.29） 400 lx）。已经发现，与相对暗的条件相比，亮光的条件在执行工作记忆方面要优越。在相关色温条件（5,000 K）下的工作记忆性能平均为48.32（标准偏差= 16.41），高于其他色温条件。结果是，