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“Characterizing the potential of daylight to fulfil non-visual requirements" by Martine Knoop

Speakers

Martine Knoop

Lecturer at the Chair of Lighting Technology

Technische Universität Berlin

Lecture from the 7th VELUX Daylight Symposium “Healthy & climate-friendly architecture– from knowledge to practice” that took place in Berlin on 3-4 May 2017. For more information visit http://thedaylightsite.com

 

Daylight is very effective in fulfilling visual and non-visual requirements in the built environment. It differentiates from electric lighting in several aspects. The dynamics in light levels and the spectral power distribution, with a strong short wavelength component, are said to be specific beneficial characteristics of the natural light source. Additionally, directionality of light seems to be of importance. Daylight from windows realizes a spatial light distribution in indoor spaces, which results in higher illumination of vertical surfaces.

 

Increased luminance of walls positively affects room appearance and user well-being, and higher vertical illuminances at eye level are associated with less fatigue in office spaces. Furthermore, inferior and nasal illumination is said to be more effective in inducing non-visual effects. Non-visual lighting requirements are various, but several psychological and physiological responses are affected by the spectral power distribution, light levels and directionality of the light. At present, daylight planning considers a minimum daylight coefficient (a constant) or the course of the daylight coefficient on a horizontal plane in the room, not reflecting the dynamics or absolute lighting levels, nor considering spatial light distribution.

 

The correlated colour temperature of the light is usually set to 6500K, or colorimetric characterization of daylight is based on measurements combining diffuse (skylight) and direct light (sunlight), even though research has shown that the spectral power distribution of specific regions of the sky (sky patches) can vary largely. To properly evaluate the impact of daylight on human beings in buildings and support healthy lighting design, it is required to consider the colorimetric characteristics of sky patches separately, and to include information on the directionality and origin of the light, additionally to horizontal and vertical illuminance levels in a room.

 

These parameters are influenced by sun position and the prevailing sky conditions, which provide the specific dynamics for all three considered aspects. The presentation will show a differentiated view on characterisation of daylight provision, using spectral information of many sky patches and the quantification of light direction. The spectral information is based on spatially resolved spectral power distribution measurements of daylight with a sky scanner of the TU Berlin. The quantification of light direction is investigated in a further research pro-ject at the TU Berlin, and provides an insight into the influence of season and sky condition on the directionality and diffuseness of the daylight. The impact of spectral power distribution and directionality of light on non-visual effects is studied by two additional PhD students. The approach will show the potential of daylight to induce non-visual effects through consideration of specific daylight characteristics.

 

Whereas the approach uses detailed spectral and directional information for now, amsimplification of the assessment will be studied in a subsequent project, to ensure applicability in the design process and development of lighting controls for healthy daylighting. Martine Knoop is Lecturer at the Chair of Lighting Technology, Technische Universität Berlin, Germany. In this role, she is responsible for research and education on indoor lighting, daylighting and colorimetry. After studying architecture and building physics at Delft University of Technology, she finalized her PhD in 2000, dealing with glare from windows and acceptance studies in daylit rooms. Before taking up her assignment at the TU Berlin, she was a senior application specialist of Philips Lighting, the Netherlands and parttime visiting professor at Eindhoven University of Technology. Her current research focuses on the unique characteristics of daylight responsible for the user preference for this light source, in order to promote and improve daylight design, as well as to develop new adaptive electric lighting solutions, to enhance user well-being and performance in indoor spaces.

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Communities

Marcus Fairs, Chris Trott, Cassie Sutherland and Cécile Brisac on Community

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"IEA Activities Towards Standartizations" by David Geisler-Moroder

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"Light and architecture" by Cui Kai

Tina Mayn, Velux Innovation (1080P).00 36 42 08.Still005
Health

Lidia Morawska on Health

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“Skylight Illumination Design of Primary Education Building Space” by Song Yehao

Mette Mogensen 500X500

"Indoor Climate Incentive Programme" by Mette Mogensen

Closure Keithriddle Healthybuildingsday

Healthy Buildings Day closure by Keith Riddle

Daylight 2007 Janejhed

DAYLIGHT + EDUCATION + TOOLS, INTRODUCTION by Jan Ejhed

Carpenter Presentation Page

9th VELUX DAYLIGHT SYMPOSIUM TO TAKE PLACE IN NOVEMBER 2021

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"Impact of the New European Standard EN17037" by Bernard Paule

Aljosa Dekleva On Flexible
Pecha KuchaFlexible

Aljosa Dekleva on Flexible | Pecha Kucha

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Epigenetics & and the built environment - Deborah Burnett

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“Daylighting the millennials” by Christoph Reinhart

Nadim Stub, Anita Derjanez And Frederik Noltenius On Health (New)
Health

Nadim Stub, Anita Derjanez and Frederik Noltenius on Health

Presenting The Lamp 5

WINNER ANNOUNCEMENT: NATURAL LIGHT INTERNATIONAL DESIGN COMPETITION

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“Healthy and sustainable buildings with daylight and fresh air” by Johannes Schwörer

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More daylight is needed to create sustainable buildings

Daylight 2009 Mohammedboubekri

DAYLIGHTING LEGISLATION AND HEALTH by Mohamed Boubekri

Ye Qing On Daylight In Architecture (Asia)
Daylight in Architecture

Ye Qing on Daylight in Architecture (Asia)

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"The Rise of Human Centric Lighting" by Kevin Houser

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"An Explorative Study on Impact of Daylight and View among Operating Room Nurse" by Marielle Aarts

Jakob Brandtberg Knudsen And Seda Kacel On Health (New)
Health

Jakob Brandtberg Knudsen and Seda Kacel on Health

Daylight 2011 Vellachiganesan

THE LIGHT WITHIN by Vellachi Ganesan

Song Yehao On Daylight In Architecture (Asia)
Daylight in Architecture

Song Yehao on Daylight in Architecture (Asia)

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Paul Bogard at the 6th VELUX Daylight Symposium

Maria Tds640

LIGHT-DRIVEN MODEL FOR IDENTIFYING INDICATORS OF NON-VISUAL HEALTH POTENTIAL IN THE BUILT ENVIRONMENT

Daylight 2009 Wesseldejonge

DAYLIGHT AND MODERNITY: DESIGN AND REDESIGN OF THE VAN NELLE DESIGN FACTORY by Wessel de Jonge

Ingrid & Katie.00 43 19 13.Still001
Health

Ingrid Reumert and Katie McCrory on Health

Keith Riddle, Wrap Up And Thank You (New)
VELUX

Keith Riddle, Wrap up and Thank you

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"Sunlight as a source of indoor illumination, studies from high latitudes" by Barbara Matusiak

Per A. Andersen, H. Glogau, N. Mossin, N. Sokol, F. Giuliani And S. Fotios
Daylight Education

Per Arnold Andersen, Henry Glogau, Natalie Mossin, Natalia Sokol, Federica Giuliani and Steve Fotios on Daylight Education

Daylight 2011 Stevefotios

HIGHLIGHTS FROM THE ACADEMIC FORUM by Steve Fotios

Chris Precht On Daylight In Architecture (Europe) Youtube
Daylight in Architecture

Chris Precht on Daylight in Architecture (Europe)

Daylight 2011 Brentrichards

THE ANTHROPOLOGY OF DAYLIGHT by Brent Richards

First International Workshop on Future Light Technology and Human Health

Claire Kimball Johnson And Lærke Hein On Affordability
Affordability

Claire Kimball Johnson and Lærke Hein on Affordability

Kevin Van Den Wymelenberg On Pandemics (New)
Pandemics

Kevin Van Den Wymelenberg on Pandemics

Lucile Sarran On Flexible
Pecha KuchaFlexible

Lucile Sarran on Flexible | Pecha Kucha

Daylight 2011 Jean Louis Scartezzini

STATE OF THE UNION IN DAYLIGHTING AT EPFL by Jean-Louis Scartezzini

January 1 2

CAPTURE THE SUN!

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What Attracts Our Visual Attention?" by Caroline Karmann

Daylight 2007 Hemmafasch

SPECIAL SCHOOL FOR DISABLED CHILDREN, SONDESCHULE SCHWECHAT, AUSTRIA by Hemma Fasch

Natalia Sokol And Federica Giuliani On Daylight Education
Daylight Education

Natalia Sokol and Federica Giuliani on Daylight Education

Per Arnold Andersen On Daylight Education (New)
Daylight Education

Per Arnold Andersen on Daylight Education

Daylight 2011 Willbruder

LIGHT DEFINES THE JOURNEY OF OUR LIVES by Will Bruder

Daylight 2009 Marilyneandersen

PROSPECTIVE DESIGN IMPLICATIONS OF RECENT FINDINGS IN PHOTOBIOLOGY by Marilyne Andersen

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"Radiance – the Interaction of Light and Matter in Building Simulations" by Greg Ward

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"Daylight levels in Swedish buildings as a base for modernized regulations" by Marie-Claude Dubois

Daylight 2009 Christophemartinsons

THE ROLE OF DAYLIGHT IN THE EXISTENT AND FUTURE FRENCH BUILDING REGULATIONS by Christophe Martinsons

Mecs Green Roof Among Others

GLANCING AT A GRASSY GREEN ROOF SIGNIFICANTLY BOOSTS CONCENTRATION

Daylight 2011 Perarnoldandersen

WELCOME TO THE 4TH SYMPOSIUM by Per Arnold Andersen

Zakaria Djebbara On Health (1080P).00 44 23 05.Still002
Health

Marco Imperadori and Lasse Lind on Health

Alejandro Pacheco Dieguez And Marie Claude Dubois On Computational Design (New)
Computational Design

Alejandro Pacheco Dieguez and Marie Claude-Dubois on Computational Design

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REGISTRATION NOW OPEN FOR 6TH VELUX DAYLIGHT SYMPOSIUM IN LONDON ON 2-3 SEPTEMBER 2015

Paul Bogard 640

THE END OF NIGHT – A MUST WATCH LECTURE ON THE IMPORTANCE OF DARK SKIES

Natalie Mossin On Daylight Education
Daylight Education

Natalie Mossin on Daylight Education

Ingrid Reumert 500X500

"Transforming Cities" by Ingrid Reumert

Pawlyn 640

FINAL PROGRAMME NOW AVAILABLE FOR THE 6TH VELUX DAYLIGHT SYMPOSIUM

Carla Cammilla Hjort 500X500 (1)

"The Big Why" by Carla Cammilla Hjort

Daylight 2009 Jamescarpenter

CONSTRUCTING THE EPHEMERAL - LIGHT IN THE PUBLIC REALM by James Carpenter

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PLENTY OF DAYLIGHT WITHOUT OVERHEATING

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LIGHT TO LIFE

Unesco (1)

UNESCO PROCLAIMS MAY 16TH AS THE INTERNATIONAL DAY OF LIGHT

Poul Høilund On Flexible
Pecha KuchaFlexible

Poul Høilund on Flexible | Pecha Kucha

Michael Ambjørn On Quality
Pecha KuchaQuality

Michael Ambjørn on Quality | Pecha Kucha

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“Value creation by architectural design – daylight as a positive driver” by Peter Andreas Sattrup

Andres

FOCUSING ON PEOPLE WITH CLEAR PRIORITIES TOWARDS BETTER ARCHITECTURE

EPFL

THE DYNAMICS OF SHADOW: ARCHITECTURE OF NATURAL LIGHT IN EXTREME LATITUDES

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ENGAGEMENT AND KNOWLEDGE SHARING IN SCIENTIFIC FORUMS

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"Window Size Effects on the Atmosphere of Daylit Spaces at High Latitudes" by Claudia Moscoso

Daylight 2011 Sylviahubalek

OFFICE WORKERS’ DAILY EXPOSURE TO LIGHT AND ITS INFLUENCE ON SLEEP QUALITY AND MOOD by Sylvia Hubalek

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“The Multi-Layer City, Reinventing Paris” by Rasmus Astrup & Frederic Chartier

Priji Balakrishnan Coverimage E1574428596135

MEASURING AND MODELLING EQUATORIAL LIGHT

Daylight 2009 Stevemwlockley

CIRCADIAN PHOTORECEPTION: MORE THAN MEETS THE EYE by Steven W. Lockley

Daylight 2009 Nickbaker

DAYLIGHT – A GIFT OF NATURE by Nick Baker

Lid Display

Lighting Design Students create new lighting possibilities for the Absalon Church

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“Windows and roof tops for our well-being: their contribution to the value...” by Marc Fontoynont

Eleonora

READING THE WEATHER

Cristián Izquierdo, José Fernando Gómez And Rick Joy On Daylight In Archite
Daylight in Architecture

Cristián Izquierdo, José Fernando Gómez and Rick Joy on Daylight in Architecture (Americas)

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"Daylight Modeling and Simulation Standards" by Zack Rogers

Daylight 2009 Pieterrimdekroon

DUTCH LIGHT – THE MOVIE by Pieter-Rim de Kroon

EUROPEAN DAYLIGHT STANDARD by Peter Raynham

Marcus Fairs, Lorenzo De Simone, Mary Parsons And Dana Behrman On Quality
Quality

Marcus Fairs, Lorenzo de Simone, Mary Parsons and Dana Behrman on Quality

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“Happy people in healthy architecture” by Lone Wiggers

Claire Kimball Johnson On Health (1)
Pecha KuchaHealth

Claire Kimball Johnson on Health | Pecha Kucha

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ARCHITECTURE FOR WELL-BEING AND HEALTH

Didier Mignery 500X500

"Transforming Cities" by Didier Mignery

Daylight 2009 Rolfgerstlauer

DAYLIGHT, SUSTAINABILITY AND HEALTH IN ARCHITECTURAL EDUCATION by Rolf Gerstlauer

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2 INSIGHTFUL DAYS AT THE 6TH VELUX DAYLIGHT SYMPOSIUM IN LONDON

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"Establishing urban scale daylight assessment in the planning process" by Paul Rogers

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THE 6TH VELUX DAYLIGHT SYMPOSIUM CONFIRMED SPEAKERS

Francisca Rodriguez On Contact To The Outdoors
Contact to the Outdoors

Francisca Rodriguez on Contact to the Outdoors

Academic Forum Bw

5th VELUX DAYLIGHT ACADEMIC FORUM

Session 6 Computational Design French.01 18 10 39.Still002 2
Computational Design

Cosmin Ticleanu on Computational Design

Mette Tony On Quality
Quality

Mette Tony on Quality

Biorythm Workshop 640

CIRCADIAN RHYTHMS & BUILDING DESIGN DISCUSSIONS AT HEALTHY BUILDINGS 2015

Green Solution House

DAYLIGHT IN THE GREEN SOLUTION HOUSE

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"Applying the New European Daylighting Standard" by Inger Erhardtsen & Werner Osterhaus

2186 Light Forms Juggler E1567494618571

REGISTRATIONS FOR THE INTERNATIONAL VELUX AWARD 2020 OPENS

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BODY CLOCKS, LIGHT, SLEEP AND HEALTH

Mette Skjold On Environment
Environment

How do we design places for life – all life? | Mette Skjold