1-introduction in Lighting.pdf

8/19/2019 1-introduction in Lighting.pdf

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Lighting Design & Smart Buildings

București, February 19th, 2015


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Introduction in Lighting

Dr.ing.

Laboratorul de Ingineria I

Universitatea Tehnica din C


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Human eye anatomy

http://en.wikipedia.org/wiki/File:Schematic_diagram_of_the_human_eye_en.svghttp://en.wikipedia.org/wiki/File:Schematic_diagram_of_the_human_eye_en.svg


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Light colour components


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Wavelength

COLOUR RANGE [nm]

Indigo 380-450

Blue 450-490

Green 490-560

Yellow 560-590

Orange 590-640

Red 640-750


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Emotional aspects

View means also emotional aspects or

correlations related with educational

process

e.g.: warm,stimulation - red, orange

cold,relaxing-blue-green,indigo

neutral- yellow-green, green

Psychological associa

important were mood is

e.g.: fire- red

rich - gold

cold- blue

anger- red

nature - green

purity- white


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http://translate.googleusercontent.com/translate_c?hl=ro&langpair=en|ro&u=http://www.metmuseum.org/explore/chinese/html_pages/elegant2.htm&rurl=translate.google.ro&usg=ALkJrhhZzuSWL-Zil7Wjpm7LErues02odQ


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Luminous flux -

Definition: quantity derived from radiant flux Φe by evaluting

according to its action upon the CIE standard photometric observ

Formula: = kme, V() d

where V() – is the spectral luminous efficiency function,

km – photometric equivalent, k

m = 683 lm/W,

e, - radiant flux [W/lm]

Unit: lumen [lm]


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Luminous intensity - I

Definition: quotient of the luminous flux dΦ

leaving the source and propagated in theelement of solid angle dΩ containing the

given direction, by the element of solid angle.

Formula: I = d / d

Unit: candela [cd]0

30°

60°

90°

120°

150°

18

60120180

cd/klm


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Illuminance - E

Definition: quotient of the luminous flux dΦ incident on an elemen

surface containing the point, by the area dΑ of that element.

Formula: E = d/dA

Unit: lux [lx]

Measurement equipment: Luxmeter


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Lambert law

2r

cIE

Influence of illuminance on visual perfo


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Influence of illuminance on visual perfo

and visual comfort performance and visu

comfort

Iluminarea, lx

V

i t e z a m e d i e d e d e t e c ţ i e , s

-

Illuminance, lx

G o o d l i g h t i n g ,

%


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Luminance - L

Definition: Ratio between Luminous intensity dI in a given

direction and the area of a section of that beam containing

the given point.

Formula: L = dI / dA cos

Unit: candela per square meter [cd/m2]

Measure equipment: Luminacemeter


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Luminous efficacy-

Definition: Ratio between total luminous flux from a lamp and

power P used by the lamp and auxiliarry equipment.

Formula: = /P

Unit: [lm/W]


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Shades of white light: Color Temperature

Colour temperature Tc in Kelvin (K)

http://en.wikipedia.org/wiki/Image:Color_temp2.png


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Color temperature and color render


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1

35

7

9

11

13

2

46

8

10

12

14

CIE test samples

C l d i i d


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Color rendering index

Rendering on a continuous spectrum

C l d i i d


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Color rendering index

Rendering with monochromatic yello

(sodium lamps)


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Lamp code

Lamp T26 36W/830

First number comes from color rendering index Ra

• 5 means Ra=50-80

• 8 means Ra=80-90

• 9 means Ra>=90


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Last two numbers comes from color temperature:

• 27 means Tc=2700 K, warm white (incandescence)

• 30 means Tc=3000 K, warm white (halogen)

• 40 means Tc=4000 K, neutral white

• 65 means TC=6500 K, coolwhite

Lamp codeLamp T26 36W/830


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Clasification

Protection index for dust and water (Protection against:

• fingers or dust

• water IP20

1. Digit

Dust

2. Digit

Water

Documents

1-introduction in Lighting.pdf