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Light regulates our biological clock, aligning our body's rhythm with the time of day. This enhances sleep quality, boosts energy, and improves well-being. Natural daylight and high-quality electric lighting that compensates the lack of natural daylight help maintain a healthy sleep-wake cycle. Morning daylight is especially crucial, signaling the brain to synchronize our circadian rhythm. If you want to bring good light into your life, explore the other steps to a healthier and happier life here: Home | Good Light Group | Foundation . Light supports us in everything we do. Good light has a positive impact on our energy, sleep, happiness, and health.

Together with the  Society for Light, Rhythms, and Circadian  Health (SLRCH) , the  Daylight Academy (DLA) , the  International Association of Lighting Designers  (IALD) and  Luger Research (LR) , we are organising and presenting the ‘deLIGHTed Talks’ lecture series. The lectures are free to attend. SAVE THE DATE: 24 April 2025 (4 PM CEST) The registration link will follow soon. ​​ In today’s fast-paced, tech-filled world, artificial light is everywhere, and it’s having a bigger impact on our sleep than we might realize. Getting the right kind of light at the right time is key to keeping our body’s internal clock, or circadian rhythm, on track. Not enough light in the morning or too much in the evening can throw off our sleep, make it harder to stay alert, and even affect our productivity. Join us as we explore how the right lighting can optimize melatonin production, support restful nights, and enhance overall well-being. More info

Our biological clock, known as the circadian rhythm, responds to the day and night cycle, influencing alertness, mood, and sleep, and is primarily driven by exposure to daylight. This clock aligns with the Earth's natural rhythm, keeping you energised during the day and sleepy at night. Ensure daily exposure to natural daylight or artificial lighting that compensates for the absence of natural light to maintain good sleep quality. To stay in sync with the Earth's 24-hour cycle, aim for at least two hours of daylight each day.

Bad lighting doesn't just affect your energy levels; it can also disrupt your sleep patterns, mood, and overall well-being. Insufficient exposure to natural light during the day or exposure to poor artificial light can disrupt your circadian rhythm, leading to daytime fatigue, low energy, and a poor mood.

As the days grow shorter and the air gets colder, many people start to notice a shift in their mood. These feelings, often referred to as the "winter blues," are linked to the seasonal changes in light and weather. Symptoms typically emerge in late autumn or early winter and tend to improve with the arrival of spring or summer. Photo by Alexander Fastovets  on Unsplash You might feel sad, less motivated, or inclined to stay at home more often. While you can still manage your daily responsibilities—like work or school—you might find yourself cancelling social plans in favour of staying in. Common symptoms of the winter blues include: Fatigue Sadness Difficulty concentrating Changes in sleep patterns For many, these mood changes are mild and can be managed with small lifestyle adjustments. However, for some individuals, the winter blues can escalate into a more serious condition called seasonal affective disorder (SAD) , a form of depression requiring professional support. A bright idea for beating the blues If you're feeling the effects of the winter blues, consider adopting a "good light" approach to your daily routine. Light plays a vital role in regulating your mood, energy levels, and sleep patterns, so increasing your exposure to natural and artificial light can make a big difference. Here are four simple steps to help: Spend Time Outdoors : Aim to get outside for at least 30 minutes every morning, even on cloudy days. If possible, spend up to two hours in daylight for maximum benefit. Sit Near Windows : When indoors, position yourself within one meter of a window to get the brightest natural light available. Use Bright Indoor Lighting : Enhance your environment with electric lighting that provides at least 500 lux of brightness during the day. Dim Lights in the Evening : Transition to softer lighting at night, keeping light levels below 20 lux to help your body wind down for sleep. By making these adjustments, you may not only reduce symptoms of the winter blues but also prevent them from taking hold in the first place. With brighter days ahead—literally and figuratively—you can navigate the colder months with more energy, focus, and positivity.

We wish you an enlightening new year filled with happiness, good health, and plenty of daylight or artificial lighting that compensates for the lack of daylight!

Lighten Corp.  wants to Create a better living world with Good Light Group.  The mission of Lighten Corp. is to support science and lighting industry experts to provide the world with healthy color solutions that benefit humanity. LED light source combines optoelectronic semiconductors and material science and is a safe and controllable artificial light source. Taiwan R&D Center has over 20 years of R&D experience and is a pioneer in manufacturing high-quality LEDs and providing solutions.   Sharing good light knowledge can benefit humanity by allowing people who live in a building to have the right light or color at the right time. Starting in 2023, their Sunray project has built a precisely 1800K ~ 10,000K white color with CRI 97+ light through simplified lighting solutions to satisfy experts in designing multiple strategies to benefit mankind. More info about Lighten Corp.

Bye Blues conceives lamps for short nocturnal awakenings. Compared with regular lamps, the light emitted by Bye Blues lamps does not impact the circadian rhythms at night and favors sleep and health. The lamp Bye Blues baby is dedicated to new parents who wake up several times per night to nurse their newborn baby.   More info about Bye Blue

Meet our science advisor Inge Declercq , a neurologist, sleep expert, and author of the books Brain Rest, The Power of Sleep, and Sleep Smarter.

In recent years, the importance of mental health has gained much-needed attention. While various factors contribute to our mental well-being, one often overlooked yet very powerful factor is daylight or electric light that compensates for the lack of daylight. Here an easy guide to use daylight wisely: How daylight can have a profound impact on our mental health. For most of the benefits you don’t have to be in direct sunlight. Being in daylight is enough. The key benefits of good light for mental health: Exposure to good light is one of the triggers that release serotonin in the brain. Higher serotonin levels are associated with improved mood, well-being, and reduced symptoms of depression and anxiety. Regulates your circadian rhythm: good light helps to keep your circadian rhythm in sync with the time of the day, improving your sleep. Good quality sleep is essential for maintaining mental health, as it reduces stress and improves cognitive function. Reduction of Seasonal Affective Disorder (SAD): SAD is a type of depression that occurs at certain times of the year, usually in the winter when there is less natural sunlight. Increasing exposure to daylight, can help alleviate the symptoms of SAD. Increased vitamin D production: daylight is a natural source of Vitamin D, which is crucial for brain health. Low levels of vitamin D have been associated with mood disorders, including depression.

We’re excited to introduce our science advisors! Together with our science advisors and lighting designers, we’re able to provide you with practical insights based on the latest research. We begin with introducing Tone Henriksen, Chief Consultant Psychiatrist, PhD, at Valen Hospital, Norway.

In today's fast-paced world, the pressure to stay connected 24/7 is undeniable. Phones and laptops rarely take a break, our minds are constantly racing, and we hardly step outside. Work pressures are intense, and the boundaries between private and work life have become increasingly blurred. This hyper-connectivity comes at a cost, impacting brain health, sleep, and overall wellbeing. To counteract these effects, disconnecting is essential. But how do we actually achieve it, and how do we make it sustainable? Cover of the book of Dr. Inge Declercq Neurologist and sleep expert Dr. Inge Declercq has answers to these pressing questions and has written a book on this urgent topic. In Breinrust ("Brain Rest"), she takes readers behind the neuroscience of disconnection, offering inspiring insights and practical tools to achieve what she calls “Disconnection Balance©.”   Here's a glimpse into some of the methods she discusses. Dr. Declercq emphasizes the importance of exposure to daylight and the right light at the right time, particularly during (micro)breaks and from the very start of your day. The book explores numerous (micro)breaks, ways to identify your best focus moments, how to “switch off” after work, get real mental rest on holidays, reduce fatigue, and live with greater stoicism.   A well-rested and clear mind is a creative and resilient one.