Human and light by Nomaled

HUMAN AND LIGHT

the importance of good lighting for well-being

Nomaled Human Centric Lighting

INDEX

The effects of light on human beings ............................................

4. 3 steps to a healthy lighting experience

5. The evolution between human and light

6. The biological clock as a guide of the human body ..................

7. Hormones: the messengers of the internal clock

12. Source references

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P. 3

P. 4

1. Negative impact of poor lighting

2. Positive impact of good lighting

P. 5

P. 6

P. 8

P. 9 9.

P. 10 10.

lighting P. 11 11.

.................................................................................... P. 12-17 A.

P. 12 B.

P. 13 C. School..................................................................................... P. 14 D.

P. 15 E. Nursing home P. 16 F.

P. 17

P. 18

P. 19

The influence of light on the human body ...................................

The solution for healthy lighting ......................................................

The added value of human centric

Applications

Office/Home office

Factory

Hospital

Home .......................................................................................

13. Additional info (external links)

1. Negative impact of poor lighting

- Sleep problems

- Tired

- Worse productivity

- Reduced concentration

- Poor digestion

- Long-term health problems

- Better sleep

- Improved concentration

- Increased productivity - Less tiredness

- Better digestion

- A well-regulated biological rhythm

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2. Positive impact of good lighting

3. The effects of light on human beings

Nomaled | Human Centric Lighting 4 lower energy andoperationalcosts conservation of natura l resou r ce s weakening of climatechange increased productivit y fewer errors + absences bettercommunication more vitality Environmentaleffects Socioculturaleffects Economic effects perception information s ight wel lbei n g respons iveness moodimprovement alertness production capacity increased Non-visual light effects Visual light effects s leep health painfree prot ection limits individuality safety psychological needs physiologicalneeds

4. 3 steps to a healthy lighting experience

Try to be within 1 meter of a window where daylight shines in. 2.

Enjoy at least 2 hours a day of natural daylight.

Is this not a possibility for you? Make sure you have good, healthy artificial lighting that can mimic natural daylight. 1. 3.

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5. The evolution between human and light

200.000 BC

invention of artificial light 1870

color spectrum of visible light (natural daylight)

color spectrum of visible light (white led)

Our body has been adjusting our biological clock to daylight for over 200,000 years. Only since 1870 we have known artificial light and since ± 2000 LED light, during these last 200 years we have been working more and more inside instead of outside. The LED lighting we know today, however, has no azure light, this is the piece of light from daylight that controls our internal clock. This azure light sits between 476nm and 495nm in the color spectrum.

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2024

6. The biological clock as a guide of the human body

Circadian rhythm is the body’s natural, internal rhythm that repeats itself approximately every 24 hours and regulates various bodily processes, such as sleep-wake cycles, body temperature, hormone release and digestion. This rhythm is synchronized by daylight, and plays a crucial role in maintaining healthy and balanced functioning of the body.

human performance throughout the day

Tijd 12u00

18u00 0u00 06u00

based on: Schmidtke, Heinz (1993): Ergonomie, Wien

Sensitive ganglion cells

Scientists discovered in the 1990s that a third type of light-sensitive cell exists, in addition to the known rods and cones.

The ganglion cells, also called spheres, are extra sensitive to light between 476nm and 495nm (azure light). These spheres stimulate the sensors in our body and control non-visual processes, such as the production of certain hormones.

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pupil lens

Iris retina

vessels

cornea

blood

fovea

7. Hormones: the messengers of the internal clock

Digestion, mood, sleep - humans are governed by complex biochemical processes. Hormones regulate when food is easily digestible, when performance is highest and when sleep is deepest.

Circadian rhythms are mainly determined by melatonin and cortisol, because they act on the body in opposite cycles. Serotonin - a natural antidepressant - also plays a crucial role in this biochemical process.

Serotonin | the ‘happy hormone’:

This hormone causes you to become alert. Not only the strength of the light, but also the light color (temperature) has a great influence on the production of serotonin. serotonin contributes to increased activity levels, stable mental well-being, peace of mind, appetite regulation, swift and adaptable thinking, heightened intuition, improved work productivity, and reduced errors. In addition, it counteracts negative feelings such as anxiety, sadness, melancholy and depression.

Melatonin | the ‘sleep hormone’:

This hormone causes you to unwind and become sleepy. As soon as it gets dark, your body converts serotonin into melatonin. Therefore, it is especially important to avoid bright light well before bedtime so that your body can produce enough melatonin. This ensures that you sleep much deeper and thus wake up rested.

Cortisol | the ‘stress hormone’:

This hormone takes care of your energy. Cortisol is released when you are stressed or make an effort. It helps regulate your body’s energy levels during exertion. Cortisol also plays an important role in your metabolism. It causes your body to break down carbohydrates, proteins and fats. Absolutely crucial.

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8. The influence of light on the human body

Scientific research1 shows that our bodies, for those who work indoors, do not get enough azure light during the day. As a result, melatonin production is not suppressed enough. As a result, we feel tired and lack energy and motivation. Consequently, we sleep worse in the evening because our melatonin levels are not high enough. It is important to compensate for the lack of daylight with good artificial light.

17:00 MUSCLES ARE THE STRONGEST AND MOST EFFECTIVE

15:30 FASTEST RESPONSE TIME

21:00 START PRODUCTION OF MELATONIN 00:00 12:00 06:00 18:00

14:30 BEST CONDITION

CIRCADIAN RHYTHM VS MELATONIN LEVEL

07:30 PRODUCTION OF MELATONIN STOPS

Good balance between azure light and time of day. This way you inhibit the production of melatonin, which raises your Cortisol levels and makes you more energetic and focused.

Starting at noon, lower light and a warmer light color (no azure light) to stimulate melatonin production and promote a good night’s sleep.

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09u00 03u00 cortisol level melatonin level 06u00 12u00 18u00 0uu00 06u00 lighting with high biological effect

V V HIGHEST MELATONIN LEVEL LOWEST MELATONIN LEVEL 02:00

DEEPEST SLEEP

10:00 HIGH ALERTNESS

9. The solution for healthy lighting

Nichia has conducted extensive research together with Fraunhofer Institute for Building Physics (IBP) on the light spectrum of conventional and full-spectrum LEDs and compared it to the light spectrum of natural daylight.

They also conducted research on the impact of light on humans and their health, accompanied by performance tests.

This research is detailed in Nichia’s white paper called Dynasolis Lighting Solutions2.

The solution is Nichia’s Dynasolis LED technology, which combines 2700K LEDs with azure LEDs to achieve the full color spectrum of daylight.

This combined with our dynamic control for the Dynasolis LED delivers a natural light experience that also stimulates our health.

Can be controlled manually or dynamically via Casambi or Dali to perfectly match the lighting to the time of day.

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Nichia azure Led Nichia 2700K Led Awards won by Nichia for their LED technology

10. The added value of human centric lighting

Human centric lighting justifies the investment by its many benefits, both in productivity and personal well-being.

The return on investment (ROI) for adequate lighting surpasses that of other workplace investments by at least two-fold.

Human Centric Lighting | Nomaled 11 Image courtesey of the world green building council blog 7/11/13

1.320 € 50.000 € 210 € Interpretation of JJL’s 3-30-300 rule3 that gives a picture of what an organization pays per square foot per year in terms of total occupancy costs. 132 €/m² building average rental cost 50.000 €/person people average labor cost

average cost per person average cost per year 10m² x = 10m² x = 1 person x = cost savings per person increased productivity 5-23% - 2.500 - 11.500 € (*) average energy price/m² average energy consumption office (60kWh/m²) x average electricity price (0,35 €/kWh) based on an average workplace area of 10m²/person 21 €/m² energy average energy price(*)

The 3-30-300 rule as a workplace strategy:

11. Applications

A. Office/Home office

- Better focus

- Increased productivity

- Increased motivation

- Improvement in general well-being

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11. Applications

B. Factory

- Being more alert

- Fewer errors

- Increased productivity

- Staying calm during stressful situations

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11. Applications

C. School

- Students are more alert in the morning

- Improved performance

- Increased concentration - Less errors

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11. Applications

D. Hospital

- Better recovery

- Less interruptions in sleep

- Better handling of pain

- Reduces trips and falls

- Staff is more productive

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11. Applications

E. Nursing Home

- Advancement of time awareness for people with dementia

- Reduces seasonal depression

- Reduces interruptions during sleep - Less risk of falling or tripping

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11. Applications

F. Home

- Better sleep

- Getting up with a good mood

- Better digestion throughout the day

- Synchronizing our biological clock

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12. Source references

1 Dr. Frank Schlie-Roosen (2014), Licht.wissen 19 - Impact of Light on Human Beings. [Licht.de] Available at: https://www.licht.de/fileadmin/Publikationen_Downloads/1403_lw19_Wir kung_auf_Mensch_web.pdf

2 NICHIA Corporation (2022), Dynasolis ™ Lighting Solution. Available at: https://led-ld.nichia.co.jp/api/docs/Nichia_Dynasolis_White_Paper_E.pdf

3 JLL.ca (2016), A surprising way to cut real estate costs. Available at: www.jll.ca/en/trends-and-insights/workplace/a-surprising-way-to-cut-realestate-costs

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13. Additional info (exteral

www.groenlichtvlaanderen.be/l/library/download/urn:uuid:a16f0c88-6b51-4287-8f90ed6f8a3ae580/hcl+gids+2020.pdf

www.groenlichtvlaanderen.be/l/library/download/urn:uuid:443eb6cf-9ffc-40d4-b388-7de 72a7a9c45/technical-approach_new_light_brochure.pdf

www.groenlichtvlaanderen.be/l/library/download/urn:uuid:deb0d1bd-e0e2-46f5-b59f4671a54ffb1a/lightingeurope_and_iald_position_paper_on_human_centric_lighting_-_febru ary_2017-1.pdf

6 www.licht.de/fileadmin/Publications/licht-wissen/1809_lw21_E_Guide_HCL_web.pdf

Human Centric Lighting | Nomaled 19 1 www.goodlightgroup.org 2 www.humancentriclighting.org

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