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Human Centric Lighting

siemens.comUnrestricted © Siemens Switzerland Ltd 2019

Unrestricted © Siemens Switzerland Ltd 2019

April 2019Page 2 Smart Infrastructure

Maintaining circadian rhythms

enhances well-being

“Improved productivity due to superior

light quality is a key driver for offices

and education buildings. Improved

sleep quality and health are driving the

interest of human-centric lighting in

healthcare facilities”

Navigant Research, 2018



Within the light concept of

the WELL Standard, there

are requirements for

circadian lighting design to

help increase occupant

comfort, productivity, health

and well-being3

Source: 1 https://www.memoori.com/portfolio/the-future-workplace/, 2017

2 World Green Building Council

3 Navigant Research - Quantifying and Standardizing the Measurement of Human-Centric Lighting 2018

4 World Green Building Council report – Health, Wellbeing and productivity in offices, 2014

Lighting is one component of a healthy building

A recent survey of end

users showed that a

majority 40.2% say natural light is helping

to concentrate.1

Improvements to lighting

results in up to 18% increase in employee

productivity4

People spend on

average 90% of their time indoors2

https://www.memoori.com/portfolio/the-future-workplace/



Case study Oslo airport – Ease jetlag of passengers by

adapting circadian rhythm to the new time zone

The premium waiting area in Oslo Airport provides travelers

with the opportunity to stay in nine differently lit zones. The

options range from the “daylight booster” zone to hue rooms

where settings like “relaxing” or “night” can individually be

chosen.

By adding this offering to their range, Oslo Airport is able to

meet clients individual expectations and needs. Allowing

travelers to ease jetlag by facilitating the adaptation of the

inner clock to the new time zone, enhancing well-being,

supporting relaxation or giving an energy boost will ultimately

lead to an improved customer experience and thus a

competitive advantage.

Source: https://www.ledsmagazine.com/articles/2017/12/jet-lagged-stop-by-the-circadian-lighting-lounge-at-oslo-airport.html

https://www.ledsmagazine.com/articles/2017/12/jet-lagged-stop-by-the-circadian-lighting-lounge-at-oslo-airport.html

Human Centric Lighting (HCL) –

In action



Effect of warm and cool lighting on circadian rhythm

Cool LightWarm Light

Recom-

mended for

evening

activities

Calming Unwinding

Recharging Relaxing

Helps to

go to sleep

Helps to

wake up

Supports studyingImproves focus

Energizing Efficient working

Increased

Perfor-

mance



Human Centric Lighting replicates the color and brightness

transition of natural light

01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00 00:00

Melatonin Cortisol

HCL helps maintaining a natural circadian

rhythm



Use case hospital – Improved patient outcome through

circadian lighting

Challenge

Inappropriate lighting can interfere with the

sleeping pattern that slows down the recovery

process of patients. It may even trigger other

medical issues in the patient.

Solution

By recreating the daylight pattern, Human Centric Lighting is shown to decrease

recovery time and reduce the need for medication by regulating sleep-wake-cycle,

ensuring visual comfort and support allover mental and physical well-being



Use case office – Maintaining circadian rhythm enhances

productivity at the workplace

Challenge

Ensuring well-being at the workplace plays an

essential role on productivity, performance and

attracting qualified employees and is crucial to

overall business success

Solution

Human Centric Lighting at the workplace can have positive effects on well-being

by ensuring visual comfort and supporting the sleep-wake rhythm. HCL also effects on

productivity by increasing the ability to focus and acting as an energy booster

and therefore enhance business performance.



Use case hotel – Maintaining circadian rhythm enhances

guest experience and well-being

Challenge

Providing guests with maximum comfort during

their stay is key to the hotels business success

Solution

Warm light in the evening allows guests to wind down, relax and improves sleep

quality while cooler light in the mornings helps to kick-start the day and energize.

This creates an overall harmonious stay, an enhanced guest experience

and thus leads to an competitive advantage for the hotel



Use case school – HCL has the ability to support cognitive

abilities impacting learning experience positively in schools

Challenge

Students inner clock often is not inline with the

school timetable which can have negative effects

on their learning ability

Solution

Depending on the time of the day, the tasks the students need to complete or

whether the students are in an exam situation, in need to focus or calm down –

Appropriate lighting can improve their attention span, focus, mood and overall well-

being



Use case industry – HCL improves focus and decreases

number of accidents

Challenge

Being able to ensure mental and physical

health, safety and precision while working in

places with no access to daylight is a challenge

employers are facing

Solution

Human Centric Lighting has the ability to simulate natural daylight and therefore support

the functioning of the internal clock. This can improve alertness, focus and ensure visual

comfort which may reduce the occurrence of accidents. Thus, Human Centric Lighting

can help to provide better safety and consistent high quality of work.

Human Centric Lighting –

Technology behind the solution



How human centric lighting works – Cool light

Dali Bus

Warm white and cool white LEDs

Cool white LEDs

• Activates the Cortisol hormones

• Replicates bright daylight

• Energizes

• Increases focus





How human centric lighting works – Warm light

Dali Bus

Warm white and cool white LEDs

Warm white LEDs

• Activates the Melantonin

hormones

• Replicates morning/evening light

• Calms

• Relaxes





Effects of exposure to warm and cool light

Co

rtis

ol

SCN

Me

lato

nin

Co

rtis

ol

Retinal Ganglion Cells

Suprachiasmatic

nucleus

https://en.wikipedia.org/wiki/Retinal_ganglion_cellhttps://en.wikipedia.org/wiki/Suprachiasmatic_nucleus



Effects of exposure to warm and cool light

SCN

Retinal Ganglion Cells

Suprachiasmatic

nucleus

Co

rtis

ol

Me

lato

nin

Co

rtis

ol

Co

rtis

ol

Me

lato

nin

https://en.wikipedia.org/wiki/Retinal_ganglion_cellhttps://en.wikipedia.org/wiki/Suprachiasmatic_nucleus

Back Up



Human Centric Lighting

From autonomous operation to full user control

Performance

Co

mp

lex

ity



Topology

PXC3.E..A PXC3.E..A PXC3.E..A

BACnet/IP

PX-classic

utpatient all nformation

esk ffice

egistration

ounter

harmacy harmacy



Other features

Commissioning

• Basic commissioning for fast

project and acceptable accuracy

• Single room commissioning

for highest accuracy

Adjustment speed and steps

• Color change below 30k steps

• Brightness change below 10lux steps

• Fully dynamic changes

Manual adjustments

• Brightness control always allowed

• Color control can be enabled

• Scene functions sets standardized

lighting to any selected situation

DALI Device Type 8 luminaires

Until new TRA FW is available,

additional 3rd party devices are required

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