E. GMP Bldg Exterior Litg 2009

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4. Eco-friendly building exterior lighting

BCA-GMP-Sesh-2009

BCA Academy (GMP) Programme

Module: Efficient Eco-lighting systems

(indoor & Outdoor)

• Buildings & Monuments

Scope – Outdoor Lighting

• Road lighting

• Parks and Gardens

• Open areas (storage yards, docks and

BCA-GMP-Sesh-2009

,• Other areas



The window of opportunity

Finding the right balance

ImageComfort

AmbiencePerformance

Total cost Trouble

–

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+

? ?

Exterior lighting of buildings

Civic pride

• Attraction

• Ambience

• Buildings

• Monuments

• Water bodies

BCA-GMP-Sesh-2009

•• Tourism

•• Trees & Gardens



Brussels

BCA-GMP-Sesh-2009

London

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Paris

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– Develop the design brief

Exterior lighting of Buildings

•Clients’ specification /requirement

– Study of the building

– Formation of luminous composition

– Lighting levels

–

BCA-GMP-Sesh-2009

– Design

– Presentation

– Lighting Trials & hand-over



Deco Floodlighting

– attraction

– ambience

– advertisement

– identity/ civic pride

BCA-GMP-Sesh-2009 42004-05-31

– safety

– security– orientation

• Approach

Deco Floodlighting

–

• clients specification /requirement



– Lighting levels

– Selection of Lamps & Luminaires

BCA-GMP-Sesh-2009 52004-05-31

– Calculation of numbers

– Presentation method




• Discuss the Owner’s wishes in terms of a earance, color, modelin , viewin an le etc

Developing from Clients’ Brief

• Mix of Static and Dynamic effects

• Permanent Laser from top of building notallowed by Aviation department in manycountries

• Twinkling lights are impressive initially. After

BCA-GMP-Sesh-2009

some tme, t ey may ten to appear enormal festival lights

• Moving lights also cannot reveal theArchitectural profile and 3D of building

• Approach

Deco Floodlighting

–




– Lighting levels


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Study of building

• ewng rec on

• Viewing Distance

• Surroundings and background

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• Architectural features

• Single View • Multiple

Viewing Direction

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• Close • Distant

Viewing Distance

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•Bright • Dim

Surroundings and Backgrounds

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•

Architectural Features

• Material

• Colour

• Finish

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• Determine basic geometric volume/space

Architectural Features

• Create lighting effects

• Integrate functional or interior lighting

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• Approach

Deco Floodlighting

–




– Lighting levels


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– Presentation method– Lighting Trials & hand-over

•

Luminous Composition

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• Silhouette


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•


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• Approach–

Deco Floodlighting




– Lighting levels

– Selection of Light sources

BCA-GMP-Sesh-2009 52004-05-31



• Darker the surface material, higher levels

Lighting Levels

• Reflected light reaching observers eyes(brightness) is less for highly polishedsurfaces

•

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reflective. Light bounces off and there is

hardly any effect on the building !



Reflection Characteristics

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Specular Reflection Diffuse Reflection

Surface Surrounding Lighting level

Illuminance recommendationsCIBSE Guide

Low Medium Bright

High ( 0.60) 20 lux 30 lux 60 lux

Medium ( 0.30) 40 lux 60 lux 120 lux

BCA-GMP-Sesh-2009

Low ( 0.15) 80 lux 120 lux 240 lux



• Approach–

Deco Floodlighting




– Lighting levels


BCA-GMP-Sesh-2009 52004-05-31


– Lighting Trials– Final installation & hand-over

Lamps

Light Sources

Low Pr =

SOXHigh Pr =

Mercur /

Low Pr =

TL

GLS & ReflectorHalogen

Gas-Discharge

Mercury Sodium

Incandescent

High Pr =

HPI

Metal Halide

Low voltage

Normal voltage

BCA-GMP-Sesh-2009

=

SON

SDW

Blendedtypes

CFLInduction

MHNMHW

MHD

CDM



Light source properties

• Colour Rendering

• Luminous efficacy

• Size

BCA-GMP-Sesh-2009

Colour Temperature

BCA-GMP-Sesh-2009

3000 K2000 K 4000 K



CDM - 3000 K - Ra 83SON - 1950 K - Ra 25

Colour Rendering

BCA-GMP-Sesh-2009

•Positioning Floodlights to achieve differentbrightness levels

Luminaire Locations

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Viewing Direction



• Flat Facade Rectan ular s mmetrical

Luminaire Selection

Medium/ Wide Beam

• Flat Façade Rotationally symmetric

(Tall Buildings) (Narrow Beam)

• Tall columns Rotationally symmetric

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(Narrow Beam)

• Approach–

Deco Floodlighting




– Lighting levels


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– Lighting Trials

– Final installation & hand-over



L

Calculation of N = no. of floodlights

H

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DS

S/2

S

☯ Calculation of No. of luminaires (N) by Lumen Method

E X L X H

Step by Step Approach for Calculation

N =

C X T X UF X MF

where ,

E = Average Illuminance (lux)

H = Height in Metres

W = Width in Metres

C = Light output per lamp (lumens)

BCA-GMP-Sesh-2009

T = No. of lamps per f itt ingUF = Utilisation factor

MF = Maintenance Factor



• Approach

Deco Floodlighting

–





– Selection of Luminaire locations

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• Approach

Deco Floodlighting

–





– Selection of Luminaire locations

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– Light ing Trials & hand-over



Light Emitting Diode

(LED) Lighting

BCA-GMP-Sesh-2009

• New concept for

New Lighting Applications

Wallwash, Identification,Enhancing in ‘line ‘ forcontemporary architectureand historical monuments

BCA-GMP-Sesh-2009 9

.. Facades

. Walls

. Corniches

. Statues

. Ballustrades...



Applications : Controlled Light Output

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300 mm 600 mm 900 mmSide view

Seoul, Korea

Static lighting with LED

BCA-GMP-Sesh-2009



Dynamic impression of

water-side promenade

Hong Kong

BCA-GMP-Sesh-2009

Documents

E. GMP Bldg Exterior Litg 2009