Electric Lighting Design

Lighting Technology

DIALUX

• Download luminairesfrom all connected manufacturers

E.g. Philips

www.lighting.philips.com/nl_nl/tools_downloads/

Luminaire choice

• Choice of 1 or more luminaries

Luminaire position

Luminaire position

Evaluation

Design parameters

Requirements:

• Illuminance

• Uniformity

• Luminance ratio

• Luminance

• Color rendering index

Can be influenced by:

• Installed power

• Choice of optics

• Luminaire position/distribution

• Mounting height

TL5 diameter 16 mm HE lumen HO lumen

14 W 1200 24 W 1750

21 W 1900 39 W 3100

28 W 2600 54 W 4450

35 W 3300 49 W 4300 80 W 6150

HE = High Efficient

HO = High Output

548848

11481448 mm

Installed powerHigher power > longer lamp!

1939: 38 mm (T12)

1978: 26 mm (T8)1995: 16 mm (T5)

Innovations in fluorescent lamps

Direct Semi-Direct Diffuus

Direct-Indirect Semi-Indirect Indirect

0-10% 90-100%

10-40%60-90%

40-60%60-40%

40-60%40-60%

60-90%10-40%

90-100%0-10%

Luminous distributionCIE classification of intensity distribution

Luminous distribution

Fotometric: C- γγγγ system of coordinates

axis of rotation

C = 270

°

γ = 180°axis of tilt

C = 0°

roadsidekerbside

C = 90°

C = 180°

γ = 0°γ

γ = 90°C + 20° plane

C0 - C180 plane C90 - C270 plane

C-planes

γ-angles

Fotometric: C- γγγγ system of coordinates

Luminous distributionPolair diagram

OpticsPolair diagram

Luminous distributionPolair diagram

Luminous distributionPolair diagram

optics (example Philips)

D6 Double parabolic optic semi-glossy

M2 Reflector frosted with ribbed louvres

M6 Closed optic with frosted parabolid louvres

C61D6

C61M2M2

C61M6M6

Example of luminaire information

http://www.etaplighting.com/products/productdetail.aspx?code=U1630/149HFW&cid=3&l=en

Point source calculation

E = I cos (α) / d2

or

Eh= I cos3 α / h2

I = luminous intensity source in direction of measurement point

α = angle between vertical and direction of light source towards measurement point

d = distance between light source –measurement point

Luminaire 2 meters above table

h = 2

α = 0 => cos α = 1

Directly under luminaire:

E = I cos3 α / h2

= 648 / 4 = 162 lux

C 90

C 0

Illuminance

One meter next to measurement point:

so α = 26.56 degrees

Eh= I cos3α / h2

E = 440 * 0.893 / 4 = 79 luxC 90

C 01 m

89,05

2

)12(

2cos

22==

+

=α

a) Determine Height H

X = Length l / Height H =

5,4 m / 1,55 m = 3,48

X between 2 H and 4 H

Y = Width b / Heigth H =

3,6 m / 1,55 m = 2,3

Y between 2 H en 3 H

hL= 2,8 m

H = 1,55m

hB = 1,25 m (Example)

b =

3,6m

l = 5,4m

b) Bepaling van de lengte en breedtewaarden (X,Y)

Height H

Luminaire heigth hL

Position of viewer hB

Determining UGR value

• UGR values in Dialux can befound in table

• Determine Room parameters

Different optic

Different optic

Different optic

Different optic

Emergency Light

Emergency Light

Replacement Lighting Evacuation Lighting

Anti-Panic Lighting Exit LightingLighting for Work places

with high hazard risk

Evacuation lighting

• Is switched on when the normal lighting fails due to power failure

• Provides that people can leave the building safely

Anti-panic lighting 0.5 lux

• Safely end activity

• Orientation

• Avoid obstacles to escape

• Exit without panic

Exit route lighting 1 lux

• Signaling - indicating the exit route

• Lighting of the exit route

Lighting for Work places with high hazard risk

• 10% Of normal lighting

• > 15 lx

Schematisch overzichtAlso on the outside of

final exit

Final exit

Crossing, 1 lx

Anti Panic lighting, 0.5 lx

Exit

Level difference, 1 lx

Change of direction

1 lx

Fire extinguisher

Exit lighting: 1lx

Open zone: 0.5 lx

Elsewhere: 5 lx

Exit route lighting

1 lx

Work places with high hazard risk: 10% of normal lighting. Min. 15 lx

Practice

Electric Light Design

• Class room in a school

• Size 7.2 * 7.2 * 3.6 m3

Questions

• Which requirements

• Visual performance

− NEN EN 12464-1:

− Classroom Em = 300 lx, UGRL =19, Ra =80. Remarks: Lighting should be controllable

− Black Board Em =500 lx, UGRL = 19, Ra = 80. Remarks: prevent specular reflections

• Atmosphere

• Shape

• Direct sunlight? -> orientation!

• View?

Assignment

• Write down the light characteristics for electric lighting

• Design the electric lighting in your daylight design

• Bring this for next week for discussion