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LIGHT Irradiance Photopic response curveEfficacy of melatonin supression Brainard et al, 2001.

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Presentation on theme: "LIGHT Irradiance Photopic response curveEfficacy of melatonin supression Brainard et al, 2001."— Presentation transcript:

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2 LIGHT Irradiance

3 Photopic response curveEfficacy of melatonin supression Brainard et al, 2001

4 LJUSETS BETYDELSE Visuellt Biologiskt Emotionellt VBE

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6 Light and colour

7 Ljuskällors ljus Färgtemperatur (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) FullfärgEnkelfärg Välj alltid ljuskällor med Ra >80 (tex. fullfärgslysrör) och vid extra höga krav ljuskällor med Ra >90.

8 Ljusfärger och ytfärger Människan kan uppfatta mer än färgnyanser GlödlampaVitt lysrör Diffust dagsljusRiktat dagsljus

9 Ljusnivå och ljusfördelning Lämplig skuggbildning gör att du kan bedöma form struktur och avstånd

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11 MEHR LICHT! Horas non numero nisi serenas

12 FRITZHOLLWICH

13 CHRONOBIOLOGICAL MARKERS

14 NORMALBLIND CORTISOL LEVEL

15 CATARACT

16 INDIVIDUAL CHANGE

17 BEFORE AFTER CORTISOL LEVEL

18 PINEAL GLAND LIGHT

19 MELATONIN

20 MOST IMPORTANT CHRONOBIOLOGICAL MARKERS MELATONIN CORTISOL

21 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, (1 May 2008)

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23 SCHOOL CHILDREN IN CLASSROOMS WITH AND WITHOUT WINDOWS

24 ANNUAL VARIATION OF CORTISOL

25 CHILDREN’S BEHAVIOUR

26 SOCIABILITY VS. CORTISOL

27 CONCENTRATION VS. CORTISOL

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29 MILITARY PERSONELL WORKING UNDERGROUND OR ABOVE GROUND

30 LIGHTING LEVELS

31 ANNUAL VARIATION OF CORTISOL

32 CORTISOL AND EMOTIONS

33 ILLNESS PATTERN DURING THE YEAR

34 SEASONAL AFFECTIVE DISORDER SAD sub-SAD milder version

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41 TYPES OF SEASONAL PROBLEM

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44 The background luminance and colour temperatures influence on alertness and mental health of the human being - Govén, Laike, Pendse,Sjöberg Visual Biological Emotional

45 Cortisolnivå em försöksdagen

46 Emotioner: Aktivering

47 Emotioner: Värdering positiv/negativ

48 Reading Grades in September and January 4 4,5 5 5,5 6 6,5 7 SeptemberJanuary Month Grade Control roomsExperimental rooms General effect: F(1,52)=84,93), p=.000, The difference between the two group scores in January is not significant. Academic performance All 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 E1 E2 C1 C2 South fasade Junior School – London, UK

49 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 1 st 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= OctoberDecemberFebruaryMarch Mood Ground floorFirst floor Average Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal 2009 E1 E2 C1 C2 South fasade Junior School – London, UK

50 CONVENTIONAL BALLASTS HIGH FREQUENCY BALLASTS

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59 Visual Emotional Experienced value Biological Evaluation of a lighting application – VBE-index Evaluation of a lighting application – VBE-index

60 Biological how light within the environment influences the daily and seasonal biological rhythms Visual the possibility to perform the visual tasks within the environment over time Emotional the emotional reaction on the first impression within the environment as well as the reaction over time Experiencedvalue Evaluation of a lighting application Evaluation of a lighting application Evaluation of a lighting application – VBE-index Evaluation of a lighting application – VBE-index

61 Biological - Ocular light - Circadian effects - Mental health - Alertness Visual Visual - Task area lighting - Visual performance - Luminance ratio - Contrast - Glare Emotional - Comfort – Safe - Dynamics - Colours - Colour of light Perceived value Evaluation of a lighting application Evaluation of a lighting application Evaluation of a lighting application – VBE-index Evaluation of a lighting application – VBE-index

62 Human Quality Aspects of Lighting table 1.1 Visual index describes the possibility to perform the visual tasks within the environment over time Biological index describes 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 principles 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. 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 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 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  D é cor and the use of colours  Variations in colours and brightness in the visual field  Lighting in style with the architecture and d é cor  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 Evaluation of a lighting application VBE-index Evaluation of a lighting application VBE-index

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