Relationship between Different Levels of Luminance and Color Temperature of LED Lamps on Human Error and Work Speed in Laboratory Conditions

Abstract

The use of appropriate lighting systems can have a significant impact on improving cognitive performance parameters and reducing workplace accidents. The aim of this study was to examine the relationship between different levels of luminance and color temperature of LED lamps on human error and the work speed of individuals in laboratory conditions. This empirical study was conducted on 12 men and women volunteers. Two LED lamps with two color temperatures of 3000°K and 6000°K were set at angles of 15°, 30°, and 45° and with the same light intensity of 300 lux. Accuracy and work speed parameters were recorded at different time intervals using a target accuracy test. Statistical analysis was performed using SPSS version 26. The mean ± standard deviation age of the participants in this study was 20.9 ± 1.2 years, and 50% (6 individuals) were male. The results showed that human error among people in three different angles of luminance for color temperatures of 6000°K and 3000°K was significant (P < 0.01), and in terms of the work speed, this difference was not significant (P > 0.05). The comparison of error counts and work speed between two color temperatures of 3000°K and 6000°K at all three angles of luminance independently showed a significant difference only in error counts (P < 0.001). The results demonstrated that the angle of luminance and color temperature have an impact on human error, with individuals exhibiting fewer errors at higher color temperatures. The findings of this research can be utilized in industries that involve high cognitive performance-sensitive occupations.