Electric lighting for classrooms: Photometric and energy use calculation for four lighting fixture and layout alternatives

This report investigates the photometric performance and energy consumption of four electric lighting alternatives for classrooms, aiming to identify energy-efficient and visually effective solutions for educational environments. Conducted within the framework of the LiSE (Lighting in School Environments) research project, the study compares traditional fluorescent tube pendants (Alt. 1) with three LED-based systems: retrofit LED tubes (Alt. 2), 60x60 cm LED panels (Alt. 3), and advanced LED pendants with controllable spotlight scenes (Alt. 4). Simulations were performed using Dialux Evo 11.1 software, based on real classroom conditions in a Swedish school, following the EN 12464-1:2021 lighting standards. Results show that all LED alternatives reduce annual energy consumption, with Alt. 3, achieving the highest savings (63%) and Alt. 4 offering adaptable lighting scenarios to support varied teaching activities. The study highlights the importance of integrating lighting controls and user-centered design to enhance visual comfort, energy efficiency, and functional flexibility in learning spaces.