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Report
LIGHT
Irradiance
Photopic response curve Efficacy of melatonin supression
Brainard et al, 2001
LJUSETS BETYDELSE
Visuellt
Biologiskt
Emotionellt
VBE
Light and colour
Ljuskällors ljus
Färgtemperatur
(Kelvin)
Varmton
Vit
Dagsljus
Färgåtergivning (Ra)
<3300 K
~4000 K
>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.
Fullfärg
Enkelfärg
Välj alltid ljuskällor med Ra >80
(tex. fullfärgslysrör) och vid extra
höga krav ljuskällor med Ra >90.
Ljusfärger och ytfärger
Människan 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!
Horas non numero nisi serenas
FRITZ
HOLLWICH
CHRONOBIOLOGICAL MARKERS
CORTISOL LEVEL
NORMAL
BLIND
CATARACT
CORTISOL LEVEL
AFTER
BEFORE
PINEAL GLAND
LIGHT
MELATONIN
MOST IMPORTANT CHRONOBIOLOGICAL MARKERS
MELATONIN
CORTISOL
The ”third receptor”
Picture from: Melanopsin cells are the principal conduits for rod–cone input to non-image-forming vision
Ali 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
IN CLASSROOMS
WITH
AND WITHOUT
WINDOWS
ANNUAL VARIATION OF CORTISOL
CHILDREN’S BEHAVIOUR
SOCIABILITY VS. CORTISOL
CONCENTRATION VS. CORTISOL
MILITARY PERSONELL
WORKING UNDERGROUND
OR ABOVE GROUND
LIGHTING LEVELS
ANNUAL VARIATION OF CORTISOL
CORTISOL AND EMOTIONS
ILLNESS PATTERN DURING THE YEAR
SEASONAL AFFECTIVE DISORDER
SAD
sub-SAD
milder version
TYPES OF SEASONAL PROBLEM
Visual
Biological
Emotional
The background luminance and colour temperatures influence
on alertness and mental health of the human being
- Govén, Laike, Pendse,Sjöberg 2006
-
Cortisolnivå em försöksdagen
3
2,5
2
1,5
1
0,5
0
350
100
10
Emotioner: Aktivering
2,85
2,8
2,75
2,7
2,65
2,6
2,55
2,5
350
100
10
Emotioner: Värdering positiv/negativ
3,5
3,45
3,4
3,35
3,3
3,25
3,2
350
100
10
Junior School – London, UK
Academic performance
All of the academic performance test scores like reading, writing and math, showed a steady progress
between the tests.
E2
C2
E1
Reading Grades in September and January
C1
7
South fasade
Grade
6,5
6
5,5
5
4,5
4
September
January
Month
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.
Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal 2009
Junior School – London, UK
Comparison in Mood between different months
E2
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.
C2
E1
Mood at 09:50 in Different Months
C1
33
South fasade
32
Mood
31
30
29
28
27
26
25
October
December
Ground floor
February
First floor
March
Average
Mood assessments at 9:50. ANOVA Repeated Measures. General effect: F(3,33)=3,068, p=.031
Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal 2009
HIGH FREQUENCY BALLASTS
CONVENTIONAL BALLASTS
Evaluation of a lighting application – VBE-index
Visual
Experienced value
Biological
Emotional
Evaluation of a lighting application – VBE-index
Biological
Visual
the possibility to
perform the visual tasks
within the environment
over time
Experienced
value
Emotional
the emotional reaction
on the first impression
within the environment
as well as the reaction
over time
Evaluation of a lighting application
how light within the
environment influences
the daily and seasonal
biological rhythms
Evaluation of a lighting application – VBE-index
Visual
- Task area lighting
- Visual performance
- Luminance ratio
- Contrast
- Glare
Biological
Perceived value
Emotional
- Comfort – Safe
- Dynamics
- Colours
- Colour of light
Evaluation of a lighting application
- Ocular light
- Circadian effects
- Mental health
- Alertness
Evaluation of a lighting application VBE-index
Human Quality Aspects of Lighting
table 1.1
Visual index
Biological index
Emotional index
describes the possibility to perform
the visual tasks within the
environment over time
describes the how the light within the
environment influences the biological
daily and seasonal rhythms.
describes the emotional reaction on the
first impression within the environment
as well as the reaction over time.
Evaluation principles
Evaluation principals
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 prerequisites.
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 mental health.
Parameters
Parameters
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.
 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
 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
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
field
Average compliance index of VBE-parameters → 5= excellent 4= very good 3= basic needs 2= unsatisfactory 1= poor

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