Human Centric Lighting - IBE- · PDF fileMarket Study | Human Centric Lighting Human centric...

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Dipl.-Ing. Birthe Tralau

Lighting Application Management

+43 5572 [email protected]

Human Centric Lighting

Birthe Tralau | Human Centric Lighting | 07.10.2014

Standards to fullfill before realising biological effects of light..

4.1 Luminous environment

4.2 Luminance distribution4.2.1 General

4.2.2 Reflectance of surfaces4.2.3 Illuminance on surfaces4.3 Illuminance4.3.1 General4.3.2 Scale of illuminance

4.3.3 Illuminances on the task area4.3.4 Illuminance on the immediate surrounding area4.3.5 Illuminance on the background area 4.3.6 Illuminance uniformity4.4 Illuminance grid

4.5 Glare4.5.1 General4.5.2 Discomfort glare4.5.3 Shielding against glare4.5.4 Veiling reflections and reflected glare

4.6 Lighting in the interior space4.6.1 General4.6.2 Mean cylindrical illuminance requirement in the activity space4.6.3 Modelling4.6.4 Directional lighting of visual tasks4.7 Colour aspects4.7.1 General4.7.2 Colour appearance4.7.3 Colour rendering4.8 Flicker and stroboscopic effects4.9 Lighting of work stations with Display Screen Equipment (DSE)4.9.1 General4.9.2 Luminaire luminance limits with downward flux4.10 Maintenance factor 4.11 Energy efficiency requirements4.12 Additional benefits of daylight4.13 Variability of light

EN 12464 „Lighting of workplaces“

Birthe Tralau | Human Centric Lighting | 07.10.2014 2


EN 12464-1 saying that “Lighting should bedesigned to meet the lighting requirements of aparticular task or space in an energy efficientmanner. It is important not to compromise thevisual aspects of a lighting installation simply toreduce energy consumption. Light levels as setin this European Standard are minimumaverage illuminance values and need to bemaintained.”

EN 15193 on Energy performance of buildings –Energy requirements for lighting” states that“Having the correct lighting standard in buildingsis of paramount importance and the conventionand procedures assume that the designed andinstalled lighting scheme conforms to goodlighting practices. For new installations thedesign should be to EN 12464-1.”

EN 12464: Lighting of workplaces EN 15193: Energy requ irements for Lighting

Standards to fullfill before realising biological effects of light..

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Using daylight!


direct sunblue skyovercast skyR

elat

ive

spec

tral

sen

sitiv

ity

Using daylight!


Using daylight!


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New requirements: Melanopical effects of light

New (international) description:Melanopical effect of light

Activation

Melatonin secretion in the pineal gland

Biological effect of light

visual non-visual

Melanopsin: responsible protein for the suppression of melatonin


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Melanopical effect | What do we know?

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Spectral sensitivity

• Receptors and their spectral sensitivity


999

Spectral sensitivity

• Effect factor Rule of thumb: (acc. DIN SPEC 67600:2013)

amel,v ≅ Tcp / 7500 K

Effect factor in comparison:LED (6500 K): 0,87 Fluorescent lamp (3000 K): 0,4

amel,v =Ф melanopic

Ф visual

visualmelanopical



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� Old: Based on supression of melatonin during night time

� New: Based on sensitivity of iPRGC receptors containing melanopsin

Changes in DIN 5031:100

• Maximum of sensitivity shifted from 455nm to 490 nm• Still high weighting of “blue” part of spectra


Higher Illuminances

> 2.500300 500 750 Lux

Biological darkness

Recommended illuminances for workplaces

Activating

Illuminances recommended for synchronising the circadian rhythm!


500lux 2000lux


121212

Age dependency

• Clouding of the lens with wage• Short wavelengths are not sufficient let through (blue filter)



131313

Distribution on the retina

• effective retinal reception area in the lower third of the retina

Crucial:• Retinal illuminance, i.e. Direction, angle and flatness of the lighting: between 45 ° and 90 ° is optimal • Size of the light emitting surface




Distribution on the retina


151515

Time

Synchronisation of internal clock

Melatonin is secreted only in the evening / night

Melatonin secretion can be influenced by the date of use



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• Light during the day makes us alert; light in the evening disturbs sleep


Time


171717

DynamicNot the dose of the light quantity, but the structure (timing / dynamics) of the artificial light is critical to the effect on the circadian phase

Source: Rimmer, D. 2000, Dynamic resetting of the human circadian pacemaker by intermittent bright light



[lm]

3.000K 6.000K

[lm]

3.000K 6.000Kcolour temperature colour temperature

Standard “balanced” solution TunableWhite


Dynamic



Dynamic


2020

Melanopical effect | What do we not know?

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• Spectral sensitivity curve is provisional;for finalizing currently too little data, but integration into the pre-standard (better than nothing)

• All previous measurements and tests were made at night! Lack of evidence that the results are transferable to the day?

• The measurement of retinal illuminance is still difficult; the influence of the cones, lens, optics is still unclear to the evaluation of artificial light


2121

Melanopical effect | Planning recommendations

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� Higher illuminances

� More blue light (shorter wavelenght)

� Area light sources

� Time-varying dynamic light

� Proper period: after previous darkness, especially in the morning

� Lighting design

� Light source

� Luminaire

� Control

� Lighting concept


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Melanopical effect | SPEC 67600:2013-04

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Summary of expertise and planning recommendations in the

SPEC 67600:2013-04

Title: Biological effect of light – Planning recommendatinos

Beuth-Verlag

Date of issue: April 2013


Planning recommendations | SPEC 67600:2013-04Different applications = different requirements

Office Care


School Industry

Planning recommendations | SPEC 67600:2013-04Different applications = different requirements


Planning recommendations | SPEC 67600:2013-042 general approaches to vary the lighting

Daylight oriented Support activity during the day


Market Study | Human Centric Lighting

Human centric lighting is intended to promote a person’s well-being, mood and health. • It can improve concentration, safety and

efficiency in workplaces or educational environments.

• It can support healing processes and prevention of chronic diseases among persons with irregular daily routines or in elderly care.

Economical conclusion:• human centric lighting can cover around

7% of the general lighting market in Europe by 2020.

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Market Study | Human Centric Lighting



Applied Lighting ResearchElderly home: St. Katharina / Caritas Sociales

� Study design and analysis

� Sensor technology

� Lighting technology

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Applied Lighting Reasearch | St. Katharina, Caritas SocialesLack of daylight


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Applied Lighting Reasearch | St. Katharina, Caritas SocialesBefore > After


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Goals to be achieved by artificial lighting design:� improving the quality of life / residential

atmosphere� promoting social activities

� improving vitality, cognitive orientation, emotional state

� supporting the circadian rhythm using light as an external timing factor

� reduction of nursing efforts and medication

Applied Lighting Reasearch | St. Katharina, Caritas SocialesGoals


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Behaviour Vitality � Observation by neutral observers� Sensor data

Cognitive orientation, Emotional state

� Observation by neutral observers� Testdata� Survey of nurses

Medication� Survey of nurses� Evaluating of care records

Sleep behaviour � Sensor data

Nurses

� Questionnaire� Structured interviews� Self-report scales

Applied Lighting Reasearch | St. Katharina, Caritas SocialesVariables and methods


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Applied Lighting Reasearch | St. Katharina, Caritas SocialesLighting Scenarios

„Baseline“

Illuminance:

~ 300 lx (standard)

Colour Temperature:

3000 K (830)

Lighting Management:

static


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L1

Illuminance:

~ 1000 lx

Colour temperature:

3000 K (830)


static



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L2

Illuminance:

~ 1500 lx

Colour temperature:

8000 K (880)

Lighting management:

static



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L3

Illuminance:

300 – 3000 lx

Colour temperature:

3000 K – 8000 K

(830, 865, 880)


dynamic in intensity and colour

temperature3000



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Applied Lighting Reasearch | St. Katharina, Caritas SocialesResults: Social activities


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Applied Lighting Reasearch | St. Katharina, Caritas SocialesResults: Communication


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Applied Lighting ResearchIndustry: IWL Landsberg


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Applied Lighting Research | IWL Landsberg


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Ezyl,mel

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Dipl.-Ing. Birthe Tralau

Lighting Application Management

+43 5572 [email protected]

Thank you for yourkind attention!


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