top of page

Good light for healthier and happier people in the workplace

Updated: Aug 1, 2023

Our board member Jan Denneman was asked to give a presentation about good light by VZW Groen Licht Vlaanderen, about how light affects people.

In today's modern world more than 5 billion people spend more than 90% of their lives indoor surrounded by artificial lighting. In this presentation Jan addresses how indoor light affect your health negatively and sheds light on the importance of good light (daylight) and proper indoor lighting to live a healthy and happy life.

The adverse effects of poor indoor lighting:

Poor indoor lighting can lead to various issues, such as sleep disturbances, fatigue, restlessness, reduced energy levels, and difficulty concentrating. Long-term exposure to poor lighting may also weaken the immune system and contribute to physiological and psychological stress.

The benefits of good light:

Good light has a positive impact of good indoor light on our lives. Proper lighting can significantly improve sleep quality, mood, alertness, and concentration. It plays a crucial role in promoting overall health, enhancing productivity, and reducing healthcare costs.

The presentation:

During the presentation, several essential aspects are covered, including the holiday feeling that can be recreated through being at least two hours per day outside or good indoor lighting. Four crucial facts about light are highlighted and a practical three-step solutions to good light. The paradox of indoor lighting was also explored.

The presentation is in Dutch but you can add English subtitles on YouTube.


Recent Posts

See All


bottom of page