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Lighting & Health

Mike Simpson

Technical Director Philips Lighting

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visualeffects

lighting

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visual performance

visualeffects

lighting

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light requirement

10

5

1

10 20 70age30 40 6050

source: Fortuin

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15

light requirement

10

5

1

10 20 70age30 40 6050

source: Fortuin

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7

8

6:00 12:00 18:00 24:0

Colour temperatureLIGHT COLOUR LIGHT LEVEL

20 30 40 520 30 40 50 60

3000

3500

4000

4500

5000

AgeAge

0

500

1000

1500

2000C

olou

r tem

pera

ture

(K)

Des

k illu

min

ance

(lux

)

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10

12:00 18:00 24:00

tureOLOUR LIGHT LEVEL

20 30 40 50 6040 50 60

women

AgeAge

0

500

1000

1500

2000D

esk

illum

inan

ce (l

ux)

men

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visual performance

visual comfort

visualeffects

lighting

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visual performance

working environment

visualeffects

lighting

biologicaleffects

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Lighting and alertness

alertness level

2800 lux

250 lux

-1

-5

-9

-130 2 4 6 8

hrs. after midnight

source: Boyce et.al.

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Lighting and alertness

2

Ale

rtne

ss 4

6

8

1000 10 00010 100Light Intensity (lux)

Source: C. Cajochen, J.M. Zeitzer, C.A. Czeisler and D.J. Dijk, PH.D. Harvard Medical School

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Failure rate in Shiftwork

% d

aily

mea

n

18 22 02 06 10 14 18

60

80

100

120

140

160

time of daySource: Kerkhof, adapted from Bjerner & Svenson

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Metal Working Industry

Productivity Gains

%

100 300 500 2000(lux)

120

100

80

60

4020

0

48 %

71 %

116 %task performance: 116

101,5 rejects:

102,5 accidents:

Productivity > 20%

source: Handbuch für Beleuchtung source: van Bommell

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-1000-800-600-400-200

0200400600800

100019

60

1965

1970

1975

1980

1985

1990

1995

2000

2005

2010

2015

2020

Year

'000

Europe: Nett entrants to job market

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visual performance

working environment

visualeffects

lighting

health andwell-being

biologicaleffects

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1800’s

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1870’s

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1950’s

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1970’s

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1990’s

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21st Century

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21st Century

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21st Century

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21st Century

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21st Century

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Body rhythms: 2 * 24 hours

melatonincortisol

body temp

6 12 6 12 618 24 18 24

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The 24.5 hour cycle

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The 24.5 hour cycle

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hormone production

vision

connection tonervous system

New receptor discovered in 2002

body clock

source: Berson

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Ganglion cells

IGL

Source: Berson, Hattar et al.

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Eye Sensitivity1.0

0.5

0

400 500 550450 600 650 700

Non-Image Forming Scotopic Photopic

Source: Brainard Source: CIE Source: CIE

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Night shift algorithm

22 04 08 hours

Start up boost

Mid shift boost

Safe homeboost

Light level

Tk

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Evening shift algorithm

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Afternoonboost

Light level

Tk06 hours24

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Day shift algorithm

18 hours

morning boost

post lunch

dip

winterpm

adjustment

08

Light level

Tk

13

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Where will this be used?

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42

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44

45

46Source: Van Someren

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48

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visual performance

working environment

visualeffects

lighting

biologicaleffects

health andwell-being

New rules

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Vision related Health related

Adaptable lighting level on task

Spatial distribution

Colour rendering

Adaptable lighting level in eye

Spatial distribution

Adaptable colour appearance

Timing

Duration

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This Room Is Equipped With

Do not attempt to light with match.

Simply turn key on wall by the door.The use of Electricity for lighting is in no way harmful

to health, nor does it affect the soundness of sleep.

Edison Electric Light

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Questions ?

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