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How do we do How do we do the interior the interior lighting design lighting design analysis? analysis?

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How do we doHow do we dothe interiorthe interiorlighting designlighting designanalysis?analysis?

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IntroductionIntroduction Lighting quality is a complicated subject andLighting quality is a complicated subject andintegrates task performance, visual comfort,integrates task performance, visual comfort,social communication, mood, health, safety,social communication, mood, health, safety,well-being and aesthetic judgment. It is alsowell-being and aesthetic judgment. It is alsorelated to economics and the environmentrelated to economics and the environmentregarding the installation, maintenance andregarding the installation, maintenance andoperation of the lighting system. Proper lightingoperation of the lighting system. Proper lightingmaintenance practice, such as cleaning lamps,maintenance practice, such as cleaning lamps,luminaires, and replacing lights periodically toluminaires, and replacing lights periodically toavoid depreciation, is crucial to maintain goodavoid depreciation, is crucial to maintain goodlighting quality throughout the whole life of thelighting quality throughout the whole life of thelighting installation. Besides energylighting installation. Besides energyconservation, power quality and control benefitconservation, power quality and control benefitfrom dimmable high-frequency electronicfrom dimmable high-frequency electronicballasts. The high-frequency modulation avoidsballasts. The high-frequency modulation avoidsthe problem of ‘flicker’ that can occur whenthe problem of ‘flicker’ that can occur whenusing mains frequency ballasts.using mains frequency ballasts.

Why do we need indoorWhy do we need indoorlighting design analysis?lighting design analysis?

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What does The Center for HealthWhat does The Center for HealthDesign (2006) find out about lightingDesign (2006) find out about lightingdesign?design?

"Light impacts"Light impactshuman healthhuman healthand performanceand performanceby enablingby enablingperformance ofperformance ofvisual tasks,visual tasks,controlling thecontrolling thebody’s circadianbody’s circadiansystem, affectingsystem, affectingmood andmood andperception, andperception, andby enablingby enablingcritical chemicalcritical chemicalreactions in thereactions in thebody."body."

""Studies showStudies showthat higher lightthat higher lightlevels are linkedlevels are linkedwith betterwith betterperformance ofperformance ofcomplex visualcomplex visualtasks and lighttasks and lightrequirementsrequirementsincrease withincrease withage.age.""

""By controlling theBy controlling thebody’s circadianbody’s circadiansystem, light impactssystem, light impactsoutcomes in healthcareoutcomes in healthcaresettings by reducingsettings by reducingdepression amongdepression amongpatients, decreasingpatients, decreasinglength of stay inlength of stay inhospitals, improvinghospitals, improvingsleep and circadiansleep and circadianrhythm, lesseningrhythm, lesseningagitation amongagitation amongdementia patients,dementia patients,easing pain, andeasing pain, andimproving adjustmentimproving adjustmentto night-shift workto night-shift workamong staff.among staff.""

""The presence ofThe presence ofwindows in thewindows in theworkplace andworkplace andaccess toaccess todaylight havedaylight havebeen linked withbeen linked withincreasedincreasedsatisfaction withsatisfaction withthe workthe workenvironment.environment.""

""Adequate andAdequate andappropriateappropriateexposure to lightexposure to lightis critical foris critical forhealth and well-health and well-being of patientsbeing of patientsas well as staff inas well as staff inhealthcarehealthcaresettings. Asettings. Acombination ofcombination ofdaylight anddaylight andelectric light canelectric light canmeet thesemeet theseneeds.needs.""

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What other researchers tell us aboutWhat other researchers tell us aboutthe importance of lighting design forthe importance of lighting design for

school and workplaceschool and workplace

"When students"When studentshave a classroomhave a classroom

thatthathave not wellhave not well

control ofcontrol ofwindows andwindows and

lighting studentslighting studentsperformance isperformance is

negativelynegativelyaffected"affected"

(Johnson, 2011).(Johnson, 2011).

"Evidence indicates"Evidence indicatesthat in general,that in general,

appropriate lightingappropriate lightingquality can increasequality can increase

productivityproductivity andandperformance,performance,

decrease eyestraindecrease eyestrainandand fatigue, andfatigue, and

enhance anenhance anorganization‟sorganization‟s

opportunity foropportunity for success"success"

(Oneworkplace,(Oneworkplace,1999; Monteiro,1999; Monteiro,2012; Johnson,2012; Johnson,

2011).2011).

"Variable light"Variable lightapplies a potentialapplies a potential

advantage inadvantage inindoor officeindoor office

accommodationsaccommodationswith respect towith respect to

subjective orsubjective oremotional mood"emotional mood"

(Hoffmann, Gufler,(Hoffmann, Gufler,Griesmancher,Griesmancher,Bartenbach, &Bartenbach, &

Canazei, 2008).Canazei, 2008).

"Controlled"Controlleddaylight anddaylight andappropriateappropriate

artificialartificialilluminationilluminationneeds to beneeds to be

carefullycarefullyaddressed inaddressed in

schools as wellschools as wellbecause lightingbecause lighting

is critical tois critical tothe quality ofthe quality of

studentsstudentsperformance"performance"

(John & Timothy,(John & Timothy,2005).2005).

IInappropriatenappropriateilluminationillumination

levels “abuse thelevels “abuse thehuman eye andhuman eye and

have unfortunatehave unfortunatephysiologicalphysiological

consequences”consequences”((Jago, and TannerJago, and Tanner

,1999 cited in,1999 cited inKnirck (1970)Knirck (1970)..

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Furniture

Noise

Lighting

Temperature

Spatial arrangement

Productivity

FactorsFactorsimpactingimpactingindividualindividual

ProductivityProductivity

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Lighting quality Vs SustainabilityLighting quality Vs SustainabilityOther than productivity and healthOther than productivity and health

AAvoid light pollution potentially impacting the surroundings and neighbourhoodvoid light pollution potentially impacting the surroundings and neighbourhood 0101

RReduce the embodied energy and carbon cost of fixtures, luminaires, and lampseduce the embodied energy and carbon cost of fixtures, luminaires, and lamps0202

RReduce the level of toxic materials in lighting productseduce the level of toxic materials in lighting products0303

EEnergy efficiency is one thing. Do not miss the quality of lightingnergy efficiency is one thing. Do not miss the quality of lighting0404

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Interior lightingInterior lightingdesigndesign is one ofis one ofthe indoorthe indoorenvironmentalenvironmentalqualities thatqualities thatgreen buildingsgreen buildingsaddress.address.

There are twoThere are twoobjectives inobjectives inachieving IEQ (BEAMachieving IEQ (BEAMSociety):Society):

1) Ensure the adequacy and1) Ensure the adequacy andmaintenance of visual comfortmaintenance of visual comfortconditions achieved by the electricconditions achieved by the electriclighting provisions in occupied spaces;lighting provisions in occupied spaces;

2) Ensure artificial lighting provisions in2) Ensure artificial lighting provisions incommon areas and service areas suchcommon areas and service areas suchas plant rooms.as plant rooms.

How do we do the interior lightingHow do we do the interior lightingdesign analysis? The answer is thedesign analysis? The answer is themodelling method, calculation andmodelling method, calculation andassumptions.assumptions.

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NextNextis to insert a new room in the model. The size of theis to insert a new room in the model. The size of theroom, the material of the ceiling, walls and floor areroom, the material of the ceiling, walls and floor aredefined. The user can customise the reflection factordefined. The user can customise the reflection factoror follow the default setting of the correspondingor follow the default setting of the correspondingbuilding material. Room elements such as windows,building material. Room elements such as windows,doors or pillars are then inserted into the createddoors or pillars are then inserted into the createdroom.room.

we will identify a daylight scene to take daylightingwe will identify a daylight scene to take daylightinginto account during the calculation to build theinto account during the calculation to build thelighting model. Depends on the user’s selection, alighting model. Depends on the user’s selection, aspecific time or different sky models can be adopted.specific time or different sky models can be adopted.

First,First,How do we doHow do we do

the interiorthe interiorlighting designlighting design

analysis?analysis?

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How do we doHow do we dothe interiorthe interior

lighting designlighting designanalysis?analysis?

the model will indicate to add indoor lighting. Thethe model will indicate to add indoor lighting. Theluminaire can be selected from the database orluminaire can be selected from the database orcustomise by the user. If custom lighting is used, thecustomise by the user. If custom lighting is used, theluminous flux, power, light colour information isluminous flux, power, light colour information isrequired.required.

After completing theAfter completing thebuilding shell,building shell,

we will have to insert a calculation surface specifying the assessment height after all thewe will have to insert a calculation surface specifying the assessment height after all theparameters mentioned above are correctly inputted. We can export a contour showing the Luxparameters mentioned above are correctly inputted. We can export a contour showing the Luxlevel at the calculation surface from the program.level at the calculation surface from the program.

To calculate the Lux level (the standard unit forTo calculate the Lux level (the standard unit formeasuring the light level intensity) of the indoormeasuring the light level intensity) of the indoorarea,area,

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It is essential toIt is essential toconduct an accurateconduct an accurateanalysisanalysis that can be used to prove and apply a reputablethat can be used to prove and apply a reputablecertification such as green building certification. Ourcertification such as green building certification. Ourtrack record is conducting a daylight access analysis fortrack record is conducting a daylight access analysis fora 30-Classroom Secondary School at Development ina 30-Classroom Secondary School at Development inHong Kong to evaluate the potential sensitivity to theHong Kong to evaluate the potential sensitivity to theadjacent residents and government institutions, theadjacent residents and government institutions, theinterior lighting design, and pursue the BEAM Plusinterior lighting design, and pursue the BEAM Pluscertification.certification.

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The analysis includes maintaining horizontal and appropriatevertical illuminance, illuminance variation, limiting glare index,colour rendering, and modulation of light output applicable tothe type and use of the premises/indoor spaces.

Utilising the DIALuxlighting design software toevaluate the Site’s interiorlighting design, we considerably assess the quality andquantity of the lighting systemperformance.

the authoritative guidance (CIE Standard S008/E Lighting of Indoor Work PlacesCIE 117- 1995 Discomfort Glare in InteriorLightingThe Chartered Institution of BuildingServices EngineersCode for interior lighting (CIBSE) andIlluminating Engineering Society of NorthAmericaLighting Handbook, Reference &Applications (IESNA) publications, orequivalent)

We strictly comply with:

and attentively focus on the specificrequirements on lighting for comfort andproductivity and excluding the non-requestedinformation from consideration.

This project has been finally awarded BEAMPlus V1.2 for NB IEQ 16 & 17.

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We spend long hours indoors for almostWe spend long hours indoors for almost90%. Let’s consider the importance of90%. Let’s consider the importance of

indoor environmental quality and haveindoor environmental quality and haveit improve for our humanity.it improve for our humanity.

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ANewR Consulting Limited, a digital environmental consultant headquartered in Hong Kong since 2008.Our expertise has grown into the context of air and water qualities, noise,green building, waste management, and remediation. With extensive know-how in environmental planning and assessment, feasibility study and policyreview, ecological design, monitoring, and audit (EM&A), ANewR hasmatured to be a leading management consultancy. Standing in the digitaltransformation reign, ANewR has participated in various environmentaldigital projects – interactive 3D visualisation, immersive automation virtualenvironment, Virtual reality, automation system, and monitoring platforms.

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Contact usFor a demo