Study of visual adaptation luminance in mesopic photometry system for outdoor lighting

Abstract

The mesopic photometry region, characterized by luminance levels between 0.005 cd/m² and 5 cd/m², plays a critical role in outdoor lighting, encompassing a spectrum between the scotopic and photopic regions. While significant research has been conducted in the context of road lighting applications, the realm of outdoor lighting remains relatively unexplored in the mesopic domain. Adaptation luminance is a fundamental parameter in mesopic photometry used to derive mesopic luminances for a given measurement field. This adaptation luminance is determined by the average luminance of the visual adaptation field. This research project aims to fill the gap in understanding the performance of different lamps within the mesopic zone for outdoor lighting installations, with a particular focus on calculating the adaptation luminance of various lamps using MATLAB simulation considering the factors such as lamp type and surrounding ambient lighting effect. The findings of this research are expected to have profound implications for the optimization of outdoor lighting systems. By gaining a deeper understanding of how different lamps perform in the mesopic range and how adaptation luminance is influenced by various factors, can make more informed decisions in the design and implementation of outdoor lighting installations.