Many lighting design and architecture institutions have been building and developing daylightsimulation labs as a way to mimic the natural daylighting phenomenon and study its effects onarchitectural scale models. Natural daylight is a mixture of skylight and direct sunlight thatpenetrates Earth's atmosphere. This creates a dynamic effect, with the amount and quality ofdaylight constantly changing. This dynamicity, particularly the temporal variation of daylight,depends on the availability and elevation angle of the sun at a specific location. This study usesquantitative measurements and a literature review to identify and implement this temporalvariation into a newly developed daylight simulation lab. Since most daylight simulation labsconsist of two components – diffuse skylight and direct sunlight – this study focuses ondeveloping an artificial sun. The measurements taken throughout the day revealed a gradualchange in the correlated colour temperature of direct sunlight due to spectral changes. Thesereadings were then used to synthesize into an artificial sun for the daylight simulation lab. Thisstudy opens the discussion on replicating various physical aspects of sunlight artificially,ultimately improving the capabilities of daylight simulation labs.