Comparison Indoor Physical Environment with the Light Intensity in the Library of Bansomdejchaopraya Rajabhat University

Abstract

This study aimed to compare the intensity of light indoor building with the standard of Thailand and to compare the physical environmental indoor factors with the amount of light intensity in the library of the Bansomdejchaopraya Rajabhat University. The research instruments were observation forms and light intensity (lux meters). The research area was an 8-floors library building with a total of 593 measurement points. Data were analyzed using descriptive and inferential statistics, including number, percentage, mean, standard deviation, and comparison using t-test and F-test. The statistical significance was set at p<0.05. The results of the study found that most areas had light intensity values ​​that within the Thai standard. However, when compared to the standard, some areas had low values ​​ the standard, such as the large conference room with an average light intensity of 185 lux (the standard is 300 lux). For the important factors affecting light intensity, it was found that the patterned surface, which reflects light better than the smooth surface, measured the highest light (760 lux) on the red wall, while the white wall had the lower light value. The results of the study indicated the importance of controlling lighting in buildings according to Thai standards to increase the efficiency of space usage and reduce electricity consumption. It also provided suggestions for improvement, such as choosing the right wall color in the work area, checking the distance of the light bulbs and opening the windows to receive natural light instead of using artificial light bulbs, which can help reduce energy consumption and reduce costs.