UGR and flicker rates for the health and well-being of workers

UGR and flicker rates for the health and well-being of workers

New lighting technology for offices, classrooms and work spaces begin with the needs of those who spend many hours in front of a computer screen. On these grounds, applicable standards have been updated, as they are a good starting point for the selection of the safest and most efficient lighting fixtures. Most recent studios have highlighted two factors that are important for ensuring the quality of our work spaces: glare and flicker.

How to measure glare

The interior lighting of work spaces must meet the parameters set out in the UNI-EN 12464-1 standard, which aims to protect the health and visual comfort of workers. To this end, one of the most important factors to consider is glare, an annoying and even painful sensation induced by an illumination that is not perfect.

Today, attention to glare is more important than ever because of the presence of so many computers in our offices; in fact current standards have been updated taking into account of the reflected glare on computer screens.

Glare is measured by the UGR (Unified Glare Rating) in a scale that goes from 10 (no glare) to 30 (considerable glare), the lower the UGR value, the less direct glare. According to applicable regulation, the maximum level of glare depends on the different activities to be carried out in the illuminated space. For example in industrial spaces, the UGR should be <22, in transit areas, the value is <25.


The lighting of offices and schools requires a UGR <19. Therefore, a compliant lighting fixture for offices should have a UGR <19.

However, for the UGR to be truly <19, the value should be measured across the entire area illuminated by the fixture.

Flicker and certification

Flicker is a phenomenon connected with the rapid variations of the power current of LEDs, or of any other lighting source. In low rates, the phenomenon is not perceived; however, beyond a given level it can cause irritation, distraction and health problems, such as headaches or even epileptic seizures in highly sensitive persons. In any case, a low level of flicker is important to ensure good visual comfort and promote safety and productivity at work. Recently, the global independent safety science organization UL (Underwriters Laboratories) launched the “low optical flicker” mark that ensures a low level of flickering in technologically more advanced fixtures. The first company in Italy to have its products certified with the “low optical flicker” mark is Disano illuminazione.



New products: LED Panel UGR <19

All these quality criteria are fully met in LED Panel by Disano illuminazione, a ceiling lamp designed for offices, shopping malls, hotels, healthcare facilities and, in general, all spaces that require constant lighting. In its latest version with a true UGR <19, LED Panel can help create a fully compliant lighting system with maximum output quality thanks to latest generation LED sources. With a perfect colour rendering index (CRI 80), LED Panel offers energy efficient and visually comfortable lighting. LED Panel is a family of fixtures with different shapes and sizes that can be installed on the ceiling or as a hanging unit, and easily incorporated into any context. Its prismatic screen is designed to help the correct diffusion of light. Energy consumptions are very low thanks to LED sources and are further reduced with 0 to 1V dimmable devices. LED Panel does not pose any photobiological risk (exempt group) and is certified as a “low optical flicker”.


  • Posted by Redazione
  • On September 27, 2016
Tags: led lighting, news, office, workers