Download - LIGHT Irradiance Photopic response curveEfficacy of melatonin supression Brainard et al, 2001
LIGHTLIGHT
Irradiance
Photopic response curveEfficacy of melatonin supression
Brainard et al, 2001
LJUSETS BETYDELSE
VisuelltBiologisktEmotionelltVBE
Light and colour
Ljuskällors ljusFärgtemperatur (Kelvin)
Varmton <3300 K
Vit ~4000 K
Dagsljus >5300 K
I Sverige använder vi framför allt varmvitt ljus 3000 K
Använd vitt ljus 4000 K för att få distinktare färger och varmtonat ljus 2700 K för göra miljön mer ombonad.
Färgåtergivning (Ra)
Fullfärg Enkelfärg
Välj alltid ljuskällor med Ra >80 (tex. fullfärgslysrör) och vid extra höga krav ljuskällor med Ra >90.
Ljusfärger och ytfärgerMänniskan kan uppfatta mer än 1000000 färgnyanser
Glödlampa Vitt lysrör
Diffust dagsljus Riktat dagsljus
Ljusnivå och ljusfördelning
Lämplig skuggbildning gör att du kan bedöma form struktur och avstånd
MEHR LICHT!MEHR LICHT!
Horas non numero nisi serenasHoras non numero nisi serenas
FRITZFRITZ HOLLWICHHOLLWICH
CHRONOBIOLOGICAL MARKERSCHRONOBIOLOGICAL MARKERS
NORMAL BLIND
CORTISOL LEVEL
CATARACTCATARACT
BEFORE
AFTER
CORTISOL LEVEL
PINEAL GLAND
LIGHT
MELATONINMELATONIN
MOST IMPORTANT CHRONOBIOLOGICAL MARKERSMOST IMPORTANT CHRONOBIOLOGICAL MARKERS
MELATONINMELATONIN
CORTISOLCORTISOL
The ”third receptor”
Picture from: Melanopsin cells are the principal conduits for rod–cone input to non-image-forming visionAli D. Güler, Jennifer L. Ecker, Gurprit S. Lall, Shafiqul Haq, Cara M. Altimus, Hsi-Wen Liao, Alun R. Barnard, Hugh Cahill, Tudor C. Badea, Haiqing Zhao, Mark W. Hankins, David M. Berson, Robert J. Lucas, King-Wai Yau & Samer HattarNature 453, 102-105(1 May 2008)
SCHOOL CHILDREN SCHOOL CHILDREN IN CLASSROOMSIN CLASSROOMS
WITHWITH
AND WITHOUT AND WITHOUT WINDOWSWINDOWS
ANNUAL VARIATION OF CORTISOL
CHILDREN’S BEHAVIOURCHILDREN’S BEHAVIOUR
SOCIABILITY VS. CORTISOLSOCIABILITY VS. CORTISOL
CONCENTRATION VS. CORTISOLCONCENTRATION VS. CORTISOL
MILITARY PERSONELL MILITARY PERSONELL WORKING UNDERGROUND WORKING UNDERGROUND
OR ABOVE GROUNDOR ABOVE GROUND
LIGHTING LEVELSLIGHTING LEVELS
ANNUAL VARIATION OF CORTISOLANNUAL VARIATION OF CORTISOL
CORTISOL AND EMOTIONS
ILLNESS PATTERN DURING THE YEARILLNESS PATTERN DURING THE YEAR
SEASONAL AFFECTIVE DISORDER
SADSAD
sub-SADsub-SAD
milder versionmilder version
TYPES OF SEASONAL PROBLEMTYPES OF SEASONAL PROBLEM
The background luminance and colour temperatures influence on alertness and mental health of the human being - Govén, Laike, Pendse,Sjöberg 2006
-
Visual Biological
Emotional
0
0,5
1
1,5
2
2,5
3
350 100 10
Cortisolnivå em försöksdagen
2,5
2,55
2,6
2,65
2,7
2,75
2,8
2,85
350 100 10
Emotioner: Aktivering
3,2
3,25
3,3
3,35
3,4
3,45
3,5
350 100 10
Emotioner: Värdering positiv/negativ
Reading Grades in September and January
4
4,5
5
5,5
6
6,5
7
September JanuaryMonth
Gra
de
Control rooms Experimental rooms
General effect: F(1,52)=84,93), p=.000, The difference between the two group scores in January is not significant.
Academic performanceAll of the academic performance test scores like reading, writing and math, showed a steady progress between the tests.
Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal 2009
E1E1
E2E2
C1C1
C2C2
South fasadeSouth fasade
Junior School – London, UK
The analysis of the monthly trend of the overall mood at 09:50 revealed a significant difference between the classes on the ground floor and those on the 1st floor.
Comparison in Mood between different months
Mood at 09:50 in Different Months
Mood assessments at 9:50. ANOVA Repeated Measures. General effect: F(3,33)=3,068, p=.031
25
26
27
28
29
30
31
32
33
October December February March
Mo
od
Ground floor First floor Average
Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal 2009
E1E1
E2E2
C1C1
C2C2
South fasadeSouth fasade
Junior School – London, UK
CONVENTIONAL BALLASTSCONVENTIONAL BALLASTS
HIGH FREQUENCY BALLASTSHIGH FREQUENCY BALLASTS
VisualVisual
EmotionalEmotionalExperienced valueExperienced value
BiologicalBiological
Evaluation of a lighting application – Evaluation of a lighting application – VBE-indexVBE-index
BiologicalBiologicalhow light within the
environment influences the daily and seasonal
biological rhythms
VisualVisual the possibility to
perform the visual tasks within the environment
over time
EmotionalEmotionalthe emotional reaction on the first impression within the environment as well as the reaction
over time
ExperiencedExperienced valuevalue
Evaluation of a lighting applicationEvaluation of a lighting application
Evaluation of a lighting application – Evaluation of a lighting application – VBE-indexVBE-index
BiologicalBiological- Ocular light - Circadian effects- Mental health- Alertness
VisualVisual- Task area lighting- Visual performance- Luminance ratio- Contrast - Glare
EmotionalEmotional- Comfort – Safe- Dynamics- Colours- Colour of light
Perceived value
Evaluation of a lighting applicationEvaluation of a lighting application
Evaluation of a lighting application – Evaluation of a lighting application – VBE-indexVBE-index
Human Quality Aspects of Lighting table 1.1Visual index
describes the possibility to perform the visual tasks within
the environment over time
Biological indexdescribes the how the light
within the environment influences the biological daily
and seasonal rhythms.
Emotional index describes the emotional reaction on the first impression within the
environment as well as the reaction over time.
Evaluation principlesEach parameter is to be
evaluated in a scale of 1-5. The final index is an average
compliance of the sum of all parameters. All evaluations is to
be based on the individuals prerequisites.
Parameters Fulfilment of basic
requirement Adequate illuminance level
Uniformity Good colour rendering
Good luminance distribution Good contrasts
Avoidance of direct glare Avoidance of indirect glare No reflections in screens
Individual controls Flexibility
Orientation Use of daylight
Evaluation principalsEach parameter is to be
evaluated in a scale of 1-5. The final index is an average
compliance of the sum of all parameters. All evaluations is to
be based on the individuals mental health.
Parameters Ocular light
Appropriate light distribution and colour temperature Sufficient illuminance/
luminance levels within the visual field
Algorithmic lighting to fit the circadian effects
Working hours with daylight Daylight penetration
Location/Latitude Orientation
Type of glazing
Evaluation principals Each parameter is to be evaluated in a scale of
1-5. The final index is an average compliance of the sum
of all parameters. All evaluations is to be based on the individuals
well-being.
Parameters Modelling and accent lighting
Appropriate colour temperature and colour rendering of light Décor and the use of colours
Variations in colours and brightness in the visual field Lighting in style with the
architecture and décor Balance between complexity and unity of the environment Security and pleasantness
Use of daylight To high or low luminance within
visual fieldAverage compliance index of VBE-parameters → 5= excellent 4= very good 3= basic needs 2= unsatisfactory 1= poor
Evaluation of a lighting application Evaluation of a lighting application VBE-indexVBE-index