Performance of secondary skin on optimizing the distribution of natural lighting in building

The high intensity of sunlight in Bangka Belitung Islands has a potential to get natural lighting throughout the day. Previous research found that facades with wide glass dimensions in the Asian Region with a tropical climate, on average, are not equipped with shading devices. This causes an uneven distribution of sunlight in the room and makes users feel visual discomfort. Natural lighting should be able to work optimally utilizing secondary skin on building facades. The secondary skin can be more optimal in energy use compared to a single skin to control the entry of direct sunlight. This plays a role in creating visual comfort. The secondary skin can also work in an aesthetic part to give an attractive image, such as an element of the locality. This study aims to obtain optimal secondary skin modules. The method used is a quantitative experiment to see the daylight uniformity in the lecturer’s workspace through the application of patterns on secondary skin and simulation software Velux Daylight Visualizer 3.1 and doing descriptive analysis to get the optimal module to achieve uniformity. Through this research, it was found that the percentage of different modules affects the distribution of light entering the building.