This guide covers the standards, technologies, and practical steps you need to implement lighting that actually works. Data center lighting design isn't just about visibility-it's about operational efficiency, equipment protection, and cost control. Different work environments have specific set of UGR levels. Illuminance is defined as the quant ty of flux falling on a surface. This level of efficiency means more than a mere saving on the power consumption of the lighting, this also means that very little heat is generat d by the luminaires. In critical environments like server rooms and enterprise data centers, improper illumination can result in overheating, human error, or prolonged downtime during maintenance.