What lighting conditions mustindoor lighting meet and what lighting conditions must the areas where work activities take place, such as offices?

This regulation promulgates worker safety and energy efficiency. According to Royal Decree 486/1997, of April 14. The following minimum health and safety conditions are included in the workplace.

For example, the lighting will vary and must adapt to the characteristics of the environment and the actions carried out in that space.

In office lighting, it is best to be around 3,000-4000 degrees Kelvin, the unit that measures the color range of light.

Lighting regulations for offices and workspaces

Ultimately, this regulation represents those minimum levels that by law must reduce health risks and, at the same time, ensure that the worker will have the necessary light to carry out their activity.

Preponderance of natural light


It is established that natural lighting when it does not establish adequate visibility conditions must be completed with artificial light.

In the event that artificial light still does not cover specific needs to perform the job correctly and without health risks, it can be complemented with light focused on exact areas.


Minimum lighting levels

When performing tasks with low visual demands, it should have at least 100 lux. A place with high needs should have at least 1,000 lux.

  • Occasionally used areas should have a minimum of 50 lux
  • Areas that are used throughout the working day. must have at least 100 lux
  • Specific passage areas, 25 lux is enough.
  • Common area the minimum value is 50 lux.



  • Areas where there is an appreciable risk of falls, the values ​​for minimum illumination mentioned above must be doubled.
  • Areas in which an error of appreciation endangers the worker or third parties. The same procedure will be followed when the luminance contrast between the objective to be viewed and the background is very weak.


Interior lighting

Recommended average lighting levels table. Average Illuminance. Measured in lux (lx)

recommendations for lighting interior spaces



Distribution in work areas

In this area the lighting must be as uniform as possible, avoiding sudden variations in luminance, especially in areas where some activity is taking place.

Therefore, when installing, you must take into account those reflective areas and locate elements that prevent glare from both sunlight and high luminance artificiallight that we implant. Avoid strobing and flashing visual impression.