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Good light: the missing link between energy savings and user health

Updated: Nov 15, 2022

Jan Denneman, chairman Good Light Group, speaks at the Future Lighting event on 23 November in Gorinchem, the Netherlands.

Here is a brief summary:

The science is very clear, good light is as important for our health as good nutrition and good exercise. How can we achieve good light in indoor spaces to improve health and happiness? And how can we do this in a sustainable way?

Photo by Future Lighting

More than 90% of our lives are spent indoors, shielded from daylight. There, light levels are usually good enough to see, but far too low during the day and usually far too high at night for good health. What almost no one realises is that indoor light levels are similar to the strength of daylight outside around the times of sunrise and sunset. So if you are indoors during the day, you miss the strength of daylight when the sun is up. This upsets our biological clock and the quality of our sleep deteriorates, with all the adverse consequences for employability, health and happiness.

Electric indoor lighting should therefore compensate for the lack of daylight. Good light is the right light at the right time. Good light that reaches users' eyes should be at least five times stronger during the day than is currently the case indoors. At least 250 MEDI lux vertical to the eye. And that can certainly be done in a sustainable way. By thinking about general lighting and adding smart personal good light. A valuable application of smart lighting.

You can read more in this interview:

Link to general information on the congress:



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