The effect of lumen output and electromagnetic radiation in an indoor environment

Abstract

This study evaluates illuminance, electromagnetic radiation, and flicker characteristics of lighting systems across several indoor spaces at the Polytechnic University of Puerto Rico, including classrooms P-315, L-301, CTE-5, a library cubicle, and the gymnasium. Results indicate significant variability: some spaces had insufficient or nonuniform illumination, others exceed recommended lumen levels, and most exhibit acceptable flicker ranges, with a few showing moderate flicker linked to LED driver instability. Based on these findings, recommendations include luminaire repositioning, lamp and filter replacement, and periodic maintenance. This first-phase study contributes to improving lighting quality, visual comfort, energy efficiency, and photobiological safety in educational environments.