At the VELUX Symposium 2025, Saint-Gobain Glass presented its latest advances in daylight performance research, led by Marijana M., R&D Project Leader in optics at Saint-Gobain Recherche Paris. The research focuses on how to more accurately predict, measure, and improve daylight conditions in real-world buildings.
Daylight is essential for health and comfort, but difficult to model accurately. Variables such as weather fluctuations, building orientation, urban shading, glazing dimensions, interior layouts, surface reflectance, and even user habits, like operating blinds, impact how much daylight enters a space. This creates a gap between predicted performance and actual results.
To address this, Saint-Gobain’s R&D teams are developing new methodologies for assessing annual daylight availability and dynamic daylight metrics rather than static calculations. Post-occupancy measurements are central, offering real-world data that validate simulations and highlight strategies that deliver better daylight distribution and visual comfort.
This work is part of Saint-Gobain’s Building Sciences program, which also examines glare reduction, access to quality views, and non-visual effects such as circadian rhythm regulation. 
Source: Saint-Gobain with additional information added by Glass Balkan
