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We are always looking for people to share their lighting experiences with us. So, if you want to spend 30 days in good light, outside, in your office or home, contact us to participate, share your story or tag us in your posts on social media about good light. If you want to participate visit our 30 days good light experience page to learn more about the experience or read stories from other participants. Photo by Kornél Máhl on Unsplash We offer several options if you want to participate in the 30-day experience: Daylight A free solution and very healthy, just enjoy the outdoors for at least 2 hours a day. WiZ A simple and affordable solution to get started. You have to get used to the brightness, but it does the trick. Borrow For special participants, we also offer several lamps that can be borrowed: Sparckel Wirklicht Waldmann Brainlit Of these options, only a few lamps can be borrowed for 30 days. But feel free to write why you want to try one of these lamps for 30 days and how you will help us spread the word. More info at my 30 days experience Don't want to join the 30-day experience but just want to keep us updated on your good light situation? Even if you don't spend most of the day in good light and experience the disadvantages of staying too long in a room that is not adequately lit, let us know! Tag us @goodlightgroup or contact us at info@goodlightgroup.org.

Do you feel tired while working? Do you feel moody or depressed, have trouble waking up? Probably your lighting conditions are not optimal. You need daylight or electric light that mimics daylight, which we call: Good light! Make sure your biological clock is in sync with the time on your watch. You will sleep better, have more energy during the day and feel happier. We recommend three steps to good light that also work well against your winter blues. This video explains the three steps to good light: The best choice you can make for your health is to be outside a lot during the day, especially in the morning. At least half an hour! Daylight is the best light for our health. It has the right intensity and colour variation throughout the day. Stay within a metre of the window. With your face or side facing the window. Otherwise, your eyes will only see twilight. Your brain will synchronise with real time again, for better sleep, mood and health. For when you are mostly indoors during the day and further away from a window. Install good light in your home or other place indoors. This can be done with lamps that mimic daylight. They should mimic the variation in intensity and light colour during the day. Therefore, your brain still gets the right signals and knows what time it is because of the information the light gives. If you want to bring good light in your life, watch our latest videos, click here: Try | Home | Good Light Group | Foundation Light supports us in everything we do. Good light has a great positive impact on our experience of energy, sleep, happiness and health.

Do you feel tired while working? Can't concentrate or feel unproductive. Most likely, you don't have the right light. You need good light throughout the day to stay focused. Otherwise, your brain will get signals that it is too dark for the time of day and that it is time to go to bed. This is probably also the reason why you find it hard to fall asleep at night or why you don't sleep enough. This video is about the third step to good light. For when you are mostly inside during the day and further from a window. Install good light in your home or other indoor place. You can do this with lamps that mimic daylight. They should mimic the variation in intensity and light colour during the day. As a result your brain still gets the right signals and knows what time it is by the information the light gives. So chances are you feel productive at your laptop again. If you want to bring good light in your life, watch also the other steps to a healthier and happier life here: Try | Home | Good Light Group | Foundation Light supports us in everything we do. Good light has a great positive impact on our experience of energy, sleep, happiness and health.

On Tuesday 22 November we gathered online for the twelfth Good Light Group meeting. In these meetings we always have some participants talk about their company or new research. You can now watch the meeting online and see everything you missed or revisit the interesting parts. This meeting: Jan Denneman talks about the Facts of Light. A series of short animations by the Good Light Group about good light. Wilfried Pohl of Bartenbach talks about the project LessIsMore. Effects of a personalizable workplace lighting concept on acceptance, usability, and cognitive performance. #1 Jan Denneman – Facts of light The Good Light Group developed several short animations to make people aware of the fact that they need good light. The animations are easy for anyone to understand and easy to share. There are different themes such as our evolution, why we need good light, how to live in good light and how good light works. Watch here #2 Wilfried Pohl - the project LessIsMore This presentation is about a summary of some studies, they studied the effects of personal daylight, personal workplace lighting, on user acceptance, cognitive performance and other parameters. He talks about the awareness of workplace lighting, end users’ lighting needs and how lights should be developed. Watch here

Feeling moody or depressed, having trouble waking up? In winter we spend more time indoors. The light during the day is often too dark for our bodies and brains. This means that our eyes tell our brain that it is already getting dark and that we need to sleep. So your brain is probably not properly synchronised with real time. Try good light! Bring good light into your life to wake up better rested. This video is about the second step to good light. If you are inside, stay within one metre of the window. With your face or side facing the window. Otherwise, your eyes will still only see twilight. Your brain will synchronise with real time again, for better sleep, mood and health. Watch the first step to good light here. If you want to bring good light in your life, watch our latest videos, click here: Try | Home | Good Light Group | Foundation Light supports us in everything we do. Good light has a great positive impact on our experience of energy, sleep, happiness and health.

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/

This could very well be because your brain is not properly synchronised with real time. Try good light! Bring good light into your life to wake up better rested. In this video, we explain the first step to good light. The best choice you can make for your health is to be outside a lot during the day, especially in the morning. At least half an hour! Daylight is the best light for our health. It has the right intensity and colour variation throughout the day. We humans have evolved over tens of thousands of years by living outside to the rhythm of natural light. Our body rhythms, including alertness, mood and sleepiness, respond to the day-night rhythm of our planet. Being outside in daylight is crucial to our health and happiness. The upcoming videos explain steps two and three. If you want to bring good light in your life, watch our latest videos, click here: Try | Home | Good Light Group | Foundation Light supports us in everything we do. Good light has a great positive impact on our experience of energy, sleep, happiness and health.

Do you often sit sleepy at your laptop and feel unproductive? Are you sleepy when you want to work, need an alarm clock to wake up and feel really tired? Are you feeling down, depressed or suffering from winter blues? These are often signs that you are getting too little light during the day and too much at night. Find out how to solve these problems with the Good Light Group's new short animated videos. You'll learn what daylight does for your health and happiness. And even more importantly, you'll learn how to be in good light every day. Even if you have an indoor activity during the day. Good light is the right light at the right time. Discover the facts about light! If you want to bring good light in your life, watch our latest videos, click here: Try | Home | Good Light Group | Foundation Light supports us in everything we do. Good light has a great positive impact on our experience of energy, sleep, happiness and health.

Want to watch a particular lecture back or did you miss DLT4? You can now enjoy the two lectures, panel discussion and introduction. In the free webinar deLIGHTed talks, several lighting experts talk about different aspects of what light does to our health. In collaboration with the Daylight Academy, Society of Light Treatment and Biological Rhythms, International Association of Lighting Designers, Luger Research, we are hosting the deLIGHTed talks webinars. Three lighting professionals have been invited to talk about how good light indoors contributes to health and well-being. You can now view the lectures online’. Welcome, introduction by Dr. Debra J. Skene, University of Surrey She gave a brief introduction on the topic of how good light indoors contributes to health and well-being, as well as a brief introduction about the presenters. Watch the introduction Let the Sunshine In by Dr. Thomas Kantermann Light means life, growth, and progress. Without sunlight, life on Earth would not be possible. Research shows that lack of sunlight and exposure to artificial light at night can disturb the process of entrainment and can compromise health and well-being. One obvious solution to this challenge is to have bright days and dark nights, a solution that is progressively more and more difficult to achieve. Watch the lecture Bringing Natural Daylight Indoors by Dr. David Geisler-Moroder and Mag. Wilfried Pohl, Bartenbach Expanding the previously energy-driven building standards and certifications to so-called “Well Building” standards will increase the importance of daylighting. And Human Centric Lighting (HCL), where the health effects (Non-Image-Forming NIF) oflightare in focus, will amplify this trend, too. Design tools with climate-based dynamic annual simulations of daylighting, artificial lighting and climate facilitate holistic planning. They will show a few basics and some realized building examples. Watch the lecture Curious about the panel discussion? The experts answered a lot of questions from the registrees. Watch the panel discussion here More information about the experts or lectures here

One of our participants, Floris Wouterson, wrote a blog about why we need daylight. Everything that lives on Earth deals with the 24-hour cycle of the day. From the single-celled organisms in the oceans, to plants and animals. So do we. Part of the day is light and another part is dark. Because of this, we have a circadian process in our bodies that is programmed at 24 hours. How exactly does this work? What is 'good light'? Everyone who sits inside gets the wrong light. It's good enough to see, but unfortunately it does little for your brain and body. basically you're sitting in biological darkness, and that can even be unhealthy. "Being underexposed to good light (daylight) makes you sleep worse, have less energy during the day and more mood problems. If your body doesn't see enough daylight, it doesn't know what time it is and processes become dysregulated. The right amount of daylight is crucial to keep your biological clock properly synchronized." This problem can be solved by going outside regularly, preferably for two to three hours. Should that not work out, a daylight lamp can be a nice alternative. "The daylight lamp simulates the power (1000 lux) and spectrum of the sun which is around. In an average office, you only get a 100 lux on your eyes. But if you go outside, these numbers are much higher. Even on a cloudy day, you get between 5.000 and 10.000 lux. Is it sunny? Then you go to the 100.000 lux." Over the past 30 years, much research and publication has been done on the importance of good light, but this information still does not trickle down to society enough. "In practice, quite little is done with the information. More than 90 percent of people today have indoor jobs, which means we all spend far too long in the dark. It's almost frustrating that we're not aware of the disadvantages of that. Read more: https://www.houseofsleep.eu/

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: https://www.future-lighting.nl/meer-licht-nodig-om-biologische-klok-te-synchroniseren-en-beter-te-slapen/ Link to general information on the congress: Sprekers (future-lighting.nl)

Have you heard that a good night's sleep starts in the morning? Indeed, your body needs exposure to sunlight to reset its internal clock and know what time it is. It also gives you energy, improves your mood and well-being, and enhances your alertness and cognitive performance. Exposing yourself to bright light every morning, as soon as you wake up, can only improve your sleep latency and sleep quality. Some researchers have shown that exposure to light minutes before waking up can also be beneficial and help you feel better in the morning. Photo by Tim Marshall on Unsplash You might wonder how to do so during wintertime or even summertime when you do not want to wake up at 5am when the sun rises, and keep your curtains closed? Well, there are plenty of lights to use as luminotherapy, including the dawn simulation light. It is a light that mimic the sunrise, which will increase in intensity (0 to 250 lux) and change in colors (red to blue enriched white) for 30 minutes before your alarm clock turns off. It has been shown to improve so-called sleep inertia (= the time it takes from the moment you wake up until you are fully awake) and our well-being. We feel less sleepy, in good mood with more energy in the morning. It has even positive effect on dementia or depressed patient, it can improve mood, alertness, and circadian rhythm stability, resulting in better sleep. In a recent study, authors showed a beneficial effect on on carers' emotional distress. When patients stay in long-term care facilities, they are less frequently exposed to natural light or physical activity, so their circadian rhythms are less robust, leading to sleep disturbances, poor mood and drowsiness. Problems that caregivers face on a daily basis. In this study, they exposed patients with Korsakoff's syndrome (KS) to a daylight simulation lamp in their bedrooms for 6 weeks. They were able to measure a decrease in the severity of neuropsychiatric symptoms, a decrease in apathy and disinhibition and a possible restoration of sleep through a decrease in nocturnal behaviour due to the effect of light on circadian rhythms. It follows from these results that the level of emotional distress for the caregivers was also lower. This shows the effect of light on different levels! In short, if you want to sleep better, pay attention to sunlight in the morning! By Virginie Gabel Oey et al., 2022 https://pubmed.ncbi.nlm.nih.gov/33682627/