Assessing Circadian Stimulus Potential of Lighting Systems in Office Buildings by Simulations
Daylighting research has been primarily focused on the visible light spectrum for enhancing the quality and quantity of light in the built environment. Lighting design has been focusing on the reduction of glare and illuminance availability. A new assessment approach has been developed in recent years to address the non-visual effect of light such as circadian entrainment and alertness. The first objective of this study is to evaluate the glazing performance in terms of circadian stimulus potential, visual comfort, and task performance. The second objective is to evaluate the circadian stimulus potential of artificial lights. ALFA is used to measure the three glazing performance at eye-level in office spaces. Equivalent melanopic lux is measured at 1075 virtual nodes over 12 hours on March 21st. Results show that the electrochromic three zones system performs the best among the three glazing options.