Utilising spectral lighting simulation technique for evaluating transmitted daylight through glazing: Exploring the...

Area of Science:

• Building Science
• Photobiology
• Color Science

Background:

• Modern humans increasingly spend time indoors, making windows crucial for daylight access.
• Advancements in window technologies, like electrochromic glazing, alter transmitted daylight's spectral properties.
• Understanding light's impact on human health necessitates evaluating non-visual effects of daylight through windows.

Purpose of the Study:

• To investigate the non-visual effects of daylight transmitted through clear and smart glazing.
• To evaluate variations in color appearance under different glazing conditions.
• To assess the utility of spectral lighting simulation for analyzing these effects.

Main Methods:

• Utilized the Radiance-based Lark spectral lighting simulation tool.
• Analyzed non-visual effects by simulating photoreceptor responses (cones, rods, ipRGCs) using CIE spectral sensitivity functions.
• Assessed color appearance using six attributes: lightness, hue, chroma, vividness, depth, and clarity.

Main Results:

• The study demonstrated the impact of studied glazing on non-visual light stimulation.
• Significant variations in color appearance were observed due to different glazing types.
• Challenges, applicability, and limitations of spectral simulation techniques were identified.

Conclusions:

• Spectral simulation using tools like Lark is effective for evaluating glazing's impact on non-visual effects and color appearance.
• The proposed method offers a valuable approach for assessing human-centric building element performance.
• Further research can refine these simulation techniques for optimized indoor environments.