Most lighting is only designed to meet the visual needs in most public libraryenvironments in Sweden. Although lighting-related impacts are relevant to six Unite Nationssustainability goals, some important lighting considerations, such as circadian phase disruption,mode and productivity impact, and energy-efficient operation, are missing in current lightingoperating practices. Moreover, most of the current lighting asset management practice in publicbuildings remains “fix it if only it breaks”. With respect to people-centric health factors, visualindex, and lighting asset energy-efficient operation, this study sublimates lighting into a newperspective. Finally, the suggested comprehensive lighting operating strategies integratingdigital twins can help designers and operators in defining the optimal design/control strategy inpublic-built environments, like public library. Digital twin-based decision-making is expected tobe applied to lighting design and control in public spaces that improves visual acuity and comfort,positively impact mood and productivity, and provides recommendations on engagementprinciples under Environment Social Governance (ESG) framework to asset manager/operators.