LUX and UGR: essential parameters for visual comfort

There are two fundamental parameters to consider when designing lighting for office spaces:
– Lux
– UGR (Unified Glare Rating).

Lux measures the light intensity reaching a given surface. A well-designed office must guarantee the levels of illumination required by regulations, between 300 and 500 lux on desks, to allow clear and comfortable vision.

UGR measures the perceived level of glare. The main regulation for offices is EN 12464-1, which specifies lighting requirements for indoor workplaces. According to this standard, the maximum allowable UGR ensures visual comfort and productivity. For workstations with computer screens—the most common office setup—the recommended value is UGR ≤ 19. In other areas, such as receptions or meeting rooms, slightly higher values can be acceptable, for example UGR < 22. The UGR value does not depend solely on the characteristics of the individual luminaire: it is a relative measure, influenced by the ratio between the luminance of the light source and that of the surrounding environment.

The quality of light is therefore not just a question of power, but of balance and distribution. Uniform light distribution, achieved with multiple light sources that also illuminate walls and ceilings, reduces contrasts, improves visual adaptation and enhances the perceived quality of the environment.

The project before the product

Even the best lighting fixture can produce disappointing results if used without a coherent design. The effectiveness of lighting is not measured solely in terms of technology or design, but in its ability to integrate with the geometry of the space, the layout of the workstations and the presence of natural light.

An effective lighting design stems from the right combination of elements: the choice of suitable fixtures, the definition of a strategic layout and attention to every detail.

The importance of lighting in the quality of office spaces

Office lighting is not just a technical issue, but a design choice that affects comfort and work efficiency. Proper management of intensity, direction, colour temperature and light distribution improves productivity, reduces visual fatigue and supports user well-being. In this way, light is no longer simply an operational element, but becomes a determining factor in the overall quality of the workspace.

Custom Lighting Solutions: Tailored to Every Need

Every office is different. Size, layout, functions, and brand identity all demand specific solutions. That’s why Egoluce offers the ability to create fully customized lighting systems designed to meet any project requirement.