the influence of ambient lighting on pupils in...

The influence of ambient lighting on pupils in classroomsTommy Govén

The influence of ambient lighting on pupils in classrooms - Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal, 2009

C1

E2

Junior School South of London, UK

Control room - Manual control - HF

Control room - Manual control - HF

Absence & Daylight Sensing + Algorithmic lighting - HF

Absence & Daylight Sensing - HF

E1

C2




South fasade

C1 Manual on-offAbsence controlDaylight control

Absence controlE2 Daylight control

Algorithmic lightingC2 Manual on-off

E1

C2 E2

E1

E2

C1

C2

South fasade

Junior School – London, UK

Design of study

Control room

HF/4000K/Ra 80 HF/4000K/Ra 80

Experimental room

Eh=300 lx Eh=500 lx

Ev=325 lx

☺ Ee=235 lx☺Ee=235 lx

Ev=125 lx

Ev=650 lx

Eh=575 lx

Algorithmic Lighting



C2 E2

DF = 5.53 % DF = 4.67 %

DF,curtains = 1.73 % DF,curtains = 1.71 %

C1 E1

DF = 2.43 % DF = 1.57 %

DF,curtains = 0.06 % DF,curtains = 0.04 %

South fasade

Daylight penetrationSouth fasade

E1

E2

C1

C2

South fasade


DF=5

%DF=2%

Curtains fazing south



Reading grades

0

0,5

1,0

3,0

2,5

1,5

2,0

3,5

E1 C1 E1C1

Ground floor Ground floor

C2 E2

First floor

C2 E2

First floor

2008 Sep – 2009 May2008 Sep – 2009 Jan

E1

E2

C1

C2

South fasade


DF=2%

DF=5%

Progress in academic performanceThe progress in academic performance in reading grades between the control room and

experimental room on Ground floor and First floor E1

Initial results

Dark session Whole school year



Writing

0

0,5

1,0

3,0

2,5

1,5

2,0

3,5

E1 C1 E1C1


2008 Sep – 2009 May2008 Sep – 2009 Jan

C2 E2

First floor

C2 E2

First floor

C2

E1

E2

C1

C2

South fasade


DF=2%

DF=5%

Initial results


Progress in academic performanceThe progress in academic performance in writing grades between the control room and

experimental room on Ground floor and First floor



Math

0

0,5

1,0

3,0

2,5

1,5

2,0

3,5

E1 C1 E1C1


C2 E2

First floor

2008 Sep – 2009 May2008 Sep – 2009 Jan

E1

E2

C1

C2

South fasade


DF=2%

DF=5%

Initial results

E2

First floor

C2


Progress in academic performanceThe progress in academic performance in math grades between the control room and

experimental on Ground floor and First floor .



The analysis of the monthly trend of the overall mood at 09:50 revealed a significant difference

between control room and the experimental room on the ground floor.

Comparison in Mood on Ground floor - C1 vs. E1

E1

C1

Scale 9-36

20

22

24

26

28

30

32

Oct Dec Jan Feb Mar

C1

Scale 9-36 E1

C1

South fasade


DF=2%E1



Comparison in Mood on First floor – C2 vs. E2

The analysis of the monthly trend of the overall mood at 09:50 revealed a minor difference

between the control room and the experimental room on the 1st floor.

Scale 9-36

C2

E2

20

22

24

26

28

30

32

34

Oct Dec Jan Feb Mar

C2

E2

Scale 9-36

South fasade


DF=5%

E2

C2

The influence of ambient lighting on pupils in classrooms - Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal, 2009 Initial results



between the classes on the ground floor and those on the 1st floor. F(3,33)=3,068, p=.031

Comparison in Mood - ground floor vs. first floor

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

Scale 9-36

First floor

Ground floor

E1

E2

C1

C2

South fasade


DF=2%

DF=5%

Initial resultsThe influence of ambient lighting on pupils in classrooms - Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal, 2009

24


E1

C1

South fasade


DF=2%

Initial results

0

0,5

1

1,5

2

2,5

3

3,5

4

4,5

5

October December February March May

Co

rtis

ol

Comparison in Cortisol on Ground floor - C1 vs. E1


between control room and the experimental room on the ground floor.

E1

C1



0

0,5

1

1,5

2

2,5

3

3,5

4

4,5

October December February March May

Co

rtis

ol

Nmol/l

E2

The analysis of the monthly trend of the cortisol level at 09:50 revealed a significant interaction

between the control room and the experimental room on the 1st floor. (F(1,29)=6,792, p=.049.

Comparison in Cortisol on First floor – C2 vs. E2

South fasade


DF=5%

E2

C2

C2



Weekly use of energy – seasonal savings by controls /Ground floor C1 vs. E1/

First floor Room E2 - Daylight &Absence control

- Algorithmic scene

First floor Room C2 - Manual control (on-off)

Total; 13.7 kWh Total; 10.7 kWh


0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)

Use of energy on First floor

Ground floor Room E1 - Daylight &Absence controlGround floor Room C1 - Manual control (on-off)

0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)

Use of energy on Ground floor

DF = 2.43% DF = 1.57%

13.7 kWh 10.7 kWh

March / April 2009

Ground floor C1 –manual control (on-off) Ground floor E1 - Absence & Daylight control

16.4 kWh 12.9 kWh



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)



- Algorithmic scene



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)


DF = 2.43%

16.4 kWh 12.9 kWh

DF = 1.57%

Ground floor E1 -Absence & Daylight control Ground floor C1 –manual control (on-off)

November / December 2008

Savings by controls 22%

Savings by controls 21%

Eh 300lx Ev 125lx Eh 500lx Ev 325lx

Initial resultsThe influence of ambient lighting on pupils in classrooms - Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal, 2009

E1C1

South fasade


DF=2%


Weekly use of energy – seasonal savings by daylight /Ground floor C1 vs. First floor C2/

16.4 kWh

November / December 2008



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)



- Algorithmic scene



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)


DF = 2.43%

Ground floor C1 –manual control (on-off)

16.4 kWh



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)



- Algorithmic scene



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)Use of energy on First floor

11.4 kWh

First floor C2 –manual control (on-off)DF = 5.53%



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)



- Algorithmic scene



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time TimeP

ow

er

(W)

Use of energy on First floorMarch / April 2009


- Algorithmic scene




0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)



0

100

200

300

400

500

600

700

04:00 08:00 12:00 16:00 20:00 04:00 08:00 12:00 16:00 20:00

Time Time

Po

we

r (W

)


Ground floor C1 –manual control (on-off) First floor C2 –manual control (on-off)

DF = 2.43% DF = 5.53%

13.7 kWh 9.5 kWh

Seasonal savings by daylight 17% - ground vs. first floor

Savings by daylight 31%ground vs. first floor, mar/apr

Savings by daylight 31%ground vs. first floor, nov/dec

E1

E2

C1

C2

South fasade


DF=2%

DF=5%

The influence of ambient lighting on pupils in classrooms - Tommy Govén, Thorbjörn Laike, Peter Raynham & Eren Sansal, 2009Initial results


E1C1

South fasade


DF=2%

Daily use of energy – seasonal savings by controls

Ground floor C1 vs. E1 – 26 March 2009

Manual on/off Absence & Daylight control



E1C1

South fasade


DF=2%


Ground floor C1 vs. E1 – 26 November 2009

Manual on/off Absence & Daylight Control


Manual on/off Absence & Daylight control

Initial results



First floor C2 vs. E2 – 26 March 2009 E2

C2

South fasade


DF=5%

Manual on/off Absence & Algorithmic Daylight Control

algo



E2

C2

South fasade


DF=5%


First floor C2 vs. E2 – 26 November 2009


Manual on/off Absence & Algorithmic Daylight Control

Initial results


Thank you!

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