Energy performance of buildings - Energy requirements for lighting - Part 2: Explanation and justification of EN 15193-1, Module M9

This document provides the rationale and explanations regarding the application of Module M9 from EN 15193-1, specifically within the context of the LVS CEN/TR 15193-2:2017 technical report. It serves as a guidance material for understanding how the specified energy requirements for lighting in buildings should be interpreted and implemented. The text elaborates on the underlying assumptions and calculation methods associated with the designated module, offering clarity on how energy performance assessments should be conducted for various building types. By detailing the justification for the module's parameters, the report assists stakeholders in aligning their design and operational strategies with the outlined energy efficiency criteria. It focuses exclusively on the technical explanation of the energy performance indicators for lighting systems, ensuring that users have a clear understanding of the methodology. This resource does not introduce new requirements but rather clarifies existing provisions to facilitate consistent application across different projects and regions.