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The 3-30-300 rule

Another interview! This time for ‘OG wijzer’ which is the knowledge and information platform for technical real estate professionals in the Netherlands.

In the article below, we explain the 3-30-300 rule for the total cost of a building. Most real estate and architectural firms focus on the €3 (energy) and €30 (investment) and too little on the €300 (the people) of a building. An easy way to focus on that €300 is with good lighting. It improves the attractiveness of the building and the health and well-being of the people using it.

In general we spend 90% of our time indoors! Where we use electric light which is far too weak during the day and too strong at night.





This disrupts our biological clock, a small part in the brain that tells our body what time it is. To make sure it sends the right signals, we need daylight, the right light at the right time. A body has different functions at night than during the day. During the day you need to be alert and creative, prompted by high cortisol levels. At night, melatonin ensures that we rest and clears our brains. Sleep is an important indicator of health.


We recommend three solutions. Read more about these solutions here: Try | Home | Good Light Group | Foundation


Read more about the interview here:

https://ogwijzer.nl/artikelen/goed-licht-in-gebouwen-levert-fit-en-productief-personeel-en-financieel-voordeel-op/

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