Office lighting BREEAM guide Philips lighting guide for BREEAM Diferent people can have a very diferent interpretation of Introduction sustainability in lighting and the steps needed to address it. Rather than leave designers to their own arbitrary to a typical ofce building. In the process, it demonstrates Contents defnitions, the Building Research Establishment (BRE) how lighting can support both the occupant and the has developed an Environmental Assessment Method overall performance of the building. (BREEAM), which includes the assessment of daylight 4 oBvReErEviAeMw 11 BreRlaEtEioAnM to in e nergy 28 aEsnsveirsosnmmeennt traels ults efaonrvd bi rauorintldimficneiganslt .al iSlg oahmstisneeg sq.s uBmaRerEtneEtr A moMfe a tihs m othdille iao wnndo b rrluaditl’isdn ifgno gsresy mshtaoevmset Tf(pohrar ogfveuesg h1ty2 o-pu2ic7r a)h,l y yspopouat ccheaesnt i– csa eole pd etehnme o olfingchsettri,an ctgeio alln po dpferocseaig,c nmh,e eOse pttatinikmge an been certifed and a million registered for assessment room, circulation space, and reception. You can also since 1990. review key lighting and energy performance metrics. A of b BrRieEf EhAisMtory BREEAM 2014 Luminaire schedule The premium value attached to energy-efcient By understanding holistically the role of the lighting 6 11 30 properties with a BREEAM rating means that businesses designer in a BREEAM assessment, you can ease the can beneft very directly fnancially. At the same time, process, become more proactive in collaborative tasks they can demonstrate their commitment to corporate and eliminate some of the mystery involved in quite a IBnRteErEnAatMio nal ABRppElEicAaMtio in opfr actice Glossary social responsibility and the environment. complex exercise. 7 12 32 BREEAM and Lighting This BREEAM guidance is designed to make the process transparent, by distilling a lighting designer’s involvement It is possible to conduct an appraisal for illumination, and requirements, while raising other issues you may BREEAM Requirements Description of Appendix A visual comfort and energy, focusing on the ‘triple bottom need to be aware of. The featured example demonstrates 8 – de as isgunmerms ary for lighting 16 sinc hPeromjecst d Oepvetilmopaed 34 Tlinheis’ Aofp spolicciaatli,o enn vGiuroidnem seunmtaml anridze esc tohneo BmRicE EcrAitMer ia. hanodw itnh cer edaetsiinggn emr ogreet s uinsvtaoilnvaebdl ein b euailcdhi nBgRsE. EAM credit provisions relating to lighting and applies these practices 2 Lighting for BREEAM Lighting for BREEAM 3 Category Prerequisites Credits linked to Total Possible Points lighting designers and overall contribution weighting (as a percentage) Management 12 22 (12%) Health and Wellbeing Hea 01 Visual comfort 3-5 depending on 10 (15%) Hea 05 Acoustic building type performance Energy 19-20 depending on 30 (19%) building type Transport 3-4 9 (8%) Water 9 (6%) Materials Mat 04 Insulation 12 (12.5%) Waste 7 (7.5%) Land use and Ecology LE 05 Long term impact 10 (10%) on biodiversit BREEAM Pollution Pol 03 Surface water 13 (10%) run of Innovation 3 Additional 10 (10%) overview BREEAM is a worldwide environmental Any kind of new or existing building anywhere in the world can be assessed with this rating system. assessment method and rating system BREEAM is used in a range of formats – from country- for buildings. It identifes best practice in specifc schemes, adapted for local conditions through sustainable building design, construction to international schemes for the certifcation of individual projects worldwide. It is used in more than 50 countries, and operation and has become one of with several in Europe having gone a stage further to the most comprehensive and widely develop country-specifc BREEAM schemes operated by National Scheme Operators (NSOs). There are recognized measures of a building’s currently NSOs afliated to BREEAM in: Germany, environmental performance. the Netherlands, Norway, Spain, Sweden, Austria, Switzerland, and Luxemburg. To obtain certifcation, the scoring system must obtain certain mandatory credits specifc to building BREEAM encourages designers, clients type and level being sought. A BREEAM assessment uses recognized measures of and others to think about low carbon performance (or local best practice standards), which BREEAM rating score percentages: and low impact design, minimizing the are set against established benchmarks to evaluate a beneeforgrey cdoenmsiadnedrisn cgr eanterdgy b eyf ac bieunilcdyin g bTcahuteield gmionergaie’s us arpenesdc u icfsrceiatdet iroieanp, ,a rdeses deseingstn ca,r icboreondsa tdoru nrca ptniaogne ao fnfv d e .use. ≥85% ≥70% ≥55% ≥45% ≥30% <30% and low carbon technologies. Outstanding Excellent Very good Good Pass Unclassifed 4 Lighting for BREEAM Lighting for BREEAM 5 A brief BREEAM international BREEAM International New Construction (NC) can be history used to assess the sustainability of new buildings at the design and construction stages of a project and enables developers to evaluate, improve and demonstrate this of BREEAM consistently across the world. The scheme can be used to assess new commercial buildings (i.e. ofce, retail, industrial and residential buildings). Those that fall outside of the scope of the standard scheme require the development of bespoke criteria. BREEAM can also assess Refurbishment, In-Use, The BRE’s Environmental Assessment Communities and International schemes. BREEAM International NC rewards designs for implementing Methodology (BREEAM) for new ofce local best practice codes and standards and those buildings was introduced in 1990 which recognise local context and issues, such as culture and climate. Approved standards are available and is credited with helping to make for each country and the BREEAM Assessor and design sustainability more accountable and team can add to these by proposing local best practice transparent. After ‘BREEAM for new construction codes not yet recognized by BREEAM. ofce buildings’, new versions were The following countries have a NSO, ofering a country- specifc local scheme, which should be used in introduced for other buildings preference to BREEAM International. including superstores, industrial Germany units and existing ofces. DIFNI (Deutsches Privates Institut für Nachhaltige Immobilienwirtschaft GmbH & Co. KG), are operating In 1998, there was a major revamp of BREEAM. New BREEAM DE with an initial focus on a German version features included weighting for diferent sustainability of BREEAM International In-Use, called BREEAM DE issues, annual updates and variations for other building Bestand. http://www.difni.de types such as retail premises. Netherlands BREEAM for new homes (EcoHomes) was launched in 2000. This scheme was later updated as the Code BREEAM NL is operated in the Netherlands by the for Sustainable Homes, developed for the UK Dutch Green Building Council www.dgbc.nl under Government in 2007. license from BRE Global. An extensive update of all BREEAM schemes in Norway 2008 resulted in the introduction of mandatory BREEAM NOR is operated in Norway by the Norwegian post-construction reviews, minimum standards and Green Building Council (NGBC) www.ngbc.no under innovation credits. International versions of BREEAM licence from BRE Global. were also launched that year. Spain In 2011, BREEAM New Construction was launched, BREEAM ES is operated in Spain by the Fundacion and updated in 2014, which is now used to assess Instituto Technológico de Galicia www.itg.es under and certify new UK buildings. For refurbishment, licence from BRE Global. BREEAM UK Refurbishment and Fit-out 2014 has been launched, replacing the 2008 version. Sweden BREEAM SE is operated in Sweden by the Swedish There is also BREEAM In-Use, to help building Green Building Council www.sgbc.se under licence managers reduce running costs and improve the from BRE Global. environmental performance of existing buildings, which was introduced in 2010. Since adoption, it Austria has become a common planning requirement for BREEAM AT will be operated by DIFNI under licence non-residential buildings within the UK. Its adoption from BRE Global. The scheme is currently under has also begun across Europe, with the availability development. of the new BREEAM International 2013. Other International In the summer of 2014 the BRE updated their assessment scheme, so BREEAM New Construction Use BREEAM International manual. ‘2011’ became ‘2014’. You can fnd a summary of the changes on page eleven. 6 Lighting for BREEAM Lighting for BREEAM 7 BREEAM requirements – a summary for Over the following pages, you’ll fnd details about the credits for which the Lighting Designer is responsible. lighting Hea 01 Visual comfort (3 – 5 credits dependent on building type) In order to demonstrate this as part of the design’s deliverables, the relevant information must be incorporated Hea 01 is split into fve parts: into design drawings, daylight calculations and relevant 1. Pre-requisite: All fuorescent and compact fuorescent sections of the building specifcation or contract. lamps are ftted with high frequency ballasts. To obtain the same credit on the BREEAM International assessment, the geographical setting must be taken into designers 2. D ay-lighting: 1 - 2 credits are available if relevant account – both to refect the diference in light levels and also building areas meet good practice daylighting criteria the greater ratio between indoor and external light levels. as required by BREEAM. This is either local best practice when undertaking BREEAM International, Reference local best practice standards: You should or the BRE best practice guidance. follow national daylighting best-practice guides. As a lighting designer, you will fnd there are several credits that will fall directly into your design scope, ibnu th ief y toaub laer be eplorowa,c btiavsee adn odn e BxpReErEieAnMce Nde, wyo Cuo cnasnt riuncftuioenn c2e0 1o1t: her credits too. These are summarized 3. Gfolra dreis Caobnlintrgo lg: l1a -re 2 h cares dbietse anr ed easviaginlaebdl eo uift t, hther pouogtehn thiael d nFoayrt lBaigvRhaEtiliEanAbgMl eb, e Iynsot-eupr ncractnito iacndeah gl:e uYrieod ueto sc ,at bhneu f toB wlRlohEweEr Aen Matht iecorsnietae lar irae inclusion of overhangs or brise soleil or the inclusion (for BREEAM International). Refer to the BREEAM of blinds. documentation, which depicts minimum values of Credit & Title C avreadilaitbs le WDeitshiginn eLrisg hting LDiegshitginegr s can LDiegshitginegr s 4. V iews Out: 1 - 2 credits are available if all positions avnedr afogre v daariyoluigsh bt ufailcdtionrg r teyqpueirse. d for varying latitudes scope s inu popbotaritn ointhge rs sahwoaurled o bfe witnhdino wre olerv paenrtm baunilednint go pareenains ga rteh awti tphrionv 7idme so af na Also for the daylighting uniformity criteria for various these credits commitments adequate external view. building types and the minimum values of daylight to these credits illuminance required in which both the average 5. Internal and External Lighting: 1 - 2 credits are illuminance and minimum point illuminance must be met. Man 01 Sustainable Procurement 8 available if Illuminance levels and the zoning and The values to include in the consideration should also occupant controls for internal lighting are specifed follow BREEAM recommendations for refectance at Man 04 Stakeholder participation 4 in accordance with a relevant industry standard, as maximum room depths and window head heights. set out by BREEAM. Hea 01 Visual comfort 3 - 5 Ene 01 Reduction of Emissions 15 Ene 03 External lighting Ene 02 Energy monitoring 1 - 2 The lighting design must ensure that external energy- To demonstrate this credit, you will need to provide efcient light fttings (luminaires) are specifed and design drawings and/or relevant sections of building demonstrate efciencies in lumens/circuit Watt, specifcation or contract. You must indicate the pertinent Ene 03 External lighting 1 depending on the application and lamp type. information and provide a simple statement outlining the target and confrming that it has been met. As a lighting designer, you must ensure the external light Ene 06 Energy efcient transportation systems 2 fttings are controlled through a time switch or daylight sensor, to prevent operation during daylight hours. Tra 03 Cyclist facilities 1 - 2 A daylight sensor override on a manually-switched lighting circuit is acceptable. Tra 05 Travel plan 1 Pol 04 Reduction of night time light pollution 1 Tra 03 Cyclist facilities While the lighting designer is not responsible for To demonstrate this credit, you will need to provide NB: There are further credits available for innovation, where the team can demonstrate sustainable good all elements of obtaining this credit, there is a clear design drawings and/or relevant sections of building practice has been exceeded. This could be a one-of achievement specifc to the project, or one of the requirement for the lighting of the cycle storage facility specifcation or contract. You must indicate the pertinent ‘best practice innovation’ credits that is improving on the ‘normal’ targets set in the BREEAM credits. to be compliant with the external lighting criteria (and, information and provide a simple statement outlining the where relevant, the internal criteria too). The lighting must target and confrming that it has been met. BREEAM now includes several ‘mandatory’ minimum standards within credits, which have to be achieved regardless be controlled to avoid ‘out-of-hours’ use and operation and at no additional score to the assessment. They are noted in the explanations on pages nine and ten. Issues during daylight hours, where there is sufcient daylight in specifc to BREEAM International may difer from a standard BREEAM New Construction assessment and are also or around the facility. noted in this summary. 8 Lighting for BREEAM Lighting for BREEAM 9 Pol 04 Reduction of night time light pollution Your design must ensure the external lighting is concentrated in the appropriate areas and that upward lighting is minimized, reducing unnecessary light pollution, energy consumption and nuisance to neighboring properties. The BREEAM guide gives recommended time clock settings for safety and security lighting and instances in which 24-hour operation can still be compliant. For BREEAM International: You should be aware of the Commission Internationale d’Eclairage (CIE) guidance, which recommends the setting of a curfew. Credits requiring lighting designers to support others The credits identifed as needing a Lighting Designer’s input recognizes issues such as the value a Lighting Designer can play in attending site after occupation to adapt and adjust their lighting design to better efect, or infuence lighting that sits outside of typical scopes such as lighting for lifts and escalators, where additional input may lead to an improved and more coordinated end result. BREEAM in relation to energy Credits lighting designers need to be aware of For BREEAM credits Ene 01, 02, 03 and 06, the lighting given that they are found throughout a building, is design can make a signifcant impact. The lighting an important factor in the EPR. You should provide The remaining credits are ones that a lighting designer may not have seen as part of their brief, but which will should be optimized for placing the right light, in the the design team (and energy modeler) the calculated have an efect on the lighting design expectations nonetheless, for instance green travel plans or stakeholder right location and operated in a sustainable manner. lighting power density (Watt/m2 per 100 lux) to avoid an engagements. These documents may identify areas where for example, pedestrians are proposed to wait for When you bring together optimal lamps, control gear, ambiguity in anticipated performance. public transport, electric car charging points need better illumination or future cash point vending machines luminaires, and controls, you can create a lighting design will be located. In addition, your lighting control strategy (including any that satisfes BREEAM criteria. This will be a design that energy saving techniques and inclusion of technology, reduces energy consumption, is monitored to adapt such as presence or absence detection, daylight linking, to changing needs and creates a pleasant external etc) should also be issued to the energy modeler. environment, while also contributing to occupants’ happiness, health and productivity. Failure to do this at design stage can lead to issues of failing to secure appropriate certifcation for building BREEAM awards credits where the whole building has handover once it is constructed. It is also possible been assessed through a BRE Compliance Checking that other areas of the design overcompensate for an process, to determine the Energy Performance Ratio ‘assumed’ lighting performance – regardless of the (EPR). This includes the lighting component. efective design provided. Although lighting is only one of many energy-consuming elements in a building, the choice of lighting fxtures, BREEAM New Construction 2014* BREEAM UK NC 2014 has now been implemented Optima Project needing to achieve an average 300 lux and the other NSO’s are to follow in due course. and minimum 90 lux for 2000 hours per year or more Here are some of the key updates to the New over 80% of the foor area. Construction methodology: The View out credit has been split from the Glare Control HEA01: Visual Comfort credit. In addition, the amount of foor area required to have a view out has been reduced from 100% to 95%. High frequency ballast on fuorescent lighting is not a prerequisite, although a requirement has been added into This efectively makes a greater number of credits internal lighting that all systems are designed to avoid available for lighting, increasing HEA 01 from three credits ficker and stroboscopic efects. to four credits for an ofce-type building. Glare Control and Views Out have been split into separate ENE03: External Lighting credits. You can only receive daylight credits if you have The external lighting criterion has been simplifed. obtained the Glare Control credit. There have been no major changes proposed to the other For calculating daylight levels, an alternative average credits falling within the lighting designer’s scope. daylight illuminance method is now available, with the *Update for the UK only 10 Lighting for BREEAM Lighting for BREEAM 11 The criteria applied to the design includes: Application of BREEAM Daylight and views To be awarded the initial Daylighting Credit, the Optima • A n elongated footprint allows a daylighted open area up office must achieve at least 2% average daylight factor in to about 6 meters deep on the North and South sides, in practice 80% of the areas classified as habitable spaces. Either depending on ceiling height. Fenestration, glazing, and the uniformity ratio must be of at least 0.4 (alternately shading are all critical design parameters for optimizing assessed as having a minimum point daylight factor of for daylight while minimizing thermal problems. at least 0.8%), or both the ‘view of sky from desk height’ and the room depth criteria are satisfied. • L ocating private ofces and other enclosed spaces to As an example of how BREEAM assesses a lighting 1. A high-quality built environment with an emphasis the East and West ends of the building preserves views design, the Philips Guide has adopted a notional design, on visual comfort for occupants. The daylighting can obtain a second credit where for occupants of open-plan offices along the North and comparing both LEED and BREEAM against the similar ‘exemplary level criteria’ are achieved, with 3% average South sides. Using glass interior partitions can extend application of lighting standards. 2. A cost-effective artificial lighting solution, both daylight factor in 80% of the aggregate area of habitable both daylight and view. in terms of construction and operational costs. spaces, where a minimum point daylight factor of 1.2% The Optima Project is a virtual open-plan office with is obtained. • T he Optima demonstration design is based on a building cellular spaces, which we use to model lighting solutions. 3. M aximization of BREEAM credits, while footprint and fenestration that follow these principles. The hypothetical design specifications are as follows: maintaining the criteria above. G siteinge rtahlley ,b dueilsdiginngin agx ifso tr od mayalixgihmt izaen dth veie fwavso braebglien sd bay light The glare control strategy has incorporated brise soleil exposure and minimize the glare and heat gain. and appropriate blinds, providing shading from high- To determine terms such as ‘high quality’ and ‘comfort’, you can draw good practice from relevant industry guidance. angle summer sun and low-angle winter sun. Optima Lighting Design Optima office layout 1 Open office 2 Cell office 3 Conference/meeting room 4 Corridor 5 Entrance lobby 12 Lighting for BREEAM Lighting for BREEAM 13 Optima Lighting Design Lighting for performance and comfort The European Standard for Light and Lighting for Indoor 4. G enerous illumination for facial recognition, as Work Spaces (EN12464-1: 2011) sets out recommended gauged by mean cylindrical illuminance. The minimum and minimum standards.Key EN12464-1: 2011 parameters recommendation is 150 Lux for work areas and 50 include: Lux for circulation spaces. Where an organization’s efectiveness depends on human interaction, facial 1. A ppropriate task illuminance. The minimum for ofce lighting is particularly important. For Project Optima, work (writing, typing, reading and data processing) is the Cylindrical illumination has been assessed at 1.2m 500 Lux with a minimum-to-average uniformity of 0.6. from fnished foor level (relevant in the open-plan For circulation and lobby areas, the minimum is 100 Lux. ofce and the meeting room for seated occupants). 2. A ppropriate ambient illuminance in the near and far 5. T he Unifed Glare Rating, which evaluates luminaires in surround areas to assure balanced brightness and a specifc design, is the principal metric. The maximum visual comfort. The minimum uniformity is 0.4 and 0.1. UGR is 19 for work areas, 22 for the reception area, and 3. A dequate wall and ceiling illuminance to create a 25 for corridors. The Optima Project demonstration is comfortable visual environment. The EN12464-1 designed to meet or surpass these criteria. recommended minimum values are 75 and 50 Lux, respectively, but still brighter ceilings and walls can create a desirable sense of spatial openness. Occupant control zoning In addition to EN12464-1 criteria BREEAM asks for: Seminar or lecture rooms are to be zoned to separate presentation and audience areas. Control zones of no more than four workplaces in ofce areas. Separate zoning of stacks, reading and counter areas Task and ambient lighting in library spaces. Where you propose alternate control strategies to For the Optima demonstration design, the desks use Ambient light is also recognized as enhancing the improve on this, you must demonstrate how you Separation between activities and spaces in areas task lighting to add a supplementary level of lighting built environment. The Optima demonstration design intend to achieve the results. such as whiteboards and display screens; teaching when appropriate for the occupant. With heavy use of provides ambient illumination through wall washing, spaces; demonstration areas; dining, restaurant and IT in most workplaces, it is more common for occupants i.e. balancing the surface brightness with the space Workstations adjacent to windows or atriums and other café areas; server and dining areas, bars, activity areas, to want lower lighting levels, but to have the ability to more efectively than if a single system were applied building areas are to be separately zoned and controlled. and seated areas. boost the light locally if, for instance, they start looking to increase ambient levels. at paperwork. This allows them to reduce energy, match light levels to specifc tasks and provide individual control to occupants. Surface fnishes Light refects of light surfaces and is absorbed by dark by nearly 10%, compared to fnishes with the minimum surfaces, a phenomenon known as ‘albedo’ or refectance refectance set out in EN12464-1, illustrating the co-efcient. The Optima demonstration design adopts importance of selecting fgures that match the design. high refectance; low gloss fnishes to improve the energy-efciency of the lighting system. We use fnishes of 85% for the ceiling, 60% for the wall, and 30% for foor refectance in the modeling. This reduces consumption Maintenance factor The scheme has been designed with an overall The maintenance factor is a multiple of four factors: Lamp maintenance factor (MF) of 0.72 following evaluation lumen maintenance factor (LLMF); Lamp survival factor of lighting equipment, environment (cleanliness of (LSF); Luminaire maintenance factor (LMF); and Room environment and surface refectance) and a suggested surface maintenance factor (RSMF). (Please note that the maintenance schedule. LSF for this installation is 1, as it is assumed that all failed lamps will be replaced.) Guidance on the calculation of MF for artifcial lighting systems can be found in CIE 97-2005: Guide on the maintenance of indoor electric lighting systems. 14 Lighting for BREEAM Lighting for BREEAM 15 Description of schemes developed in Project Optima 1 Open ofce Lighting design With energy efcient design in an open-plan ofce, you will locate luminaires so that the primary working areas are appropriately illuminated and the circulation spaces around them can receive less light (and so use less energy). For efective daylight harvesting, luminaires need to be arranged into separately controlled zones, corresponding to the penetration of daylight into the area. Three typical schemes are shown here: Recessed ftting scheme Pendant ftting scheme In the recessed scheme, PowerBalance 300mm x 1200mm LED luminaires, shielded by white smart In the pendant scheme, Smart Balance direct/indirect luminaires use efcient LED lamps (4000K) with a pyramid louvers, provide the primary illumination 77% direct / 23% indirect distribution and micro lens optic. This background lighting is then supplemented with desk mounted task lighting, such as TaskFlex LED table luminaire 8W LED 370 lm 3000K Floor Plan Floor Plan Luminaires Luminaires PowerBalance 300 x 1200mm recessed LuxSpace Mini Round recessed downlight SmartBalance suspended LED* LuxSpace Mini Round recessed downlight LED 29W | 4000K | 3400 lm LED 12W | 4000K | 1076 lm 42W | 4000K | 4000 lm LED 12W | 4000K | 1076 lm TaskFlex LED table luminaire *with micro lens optic (ftting suspended at 2.3m) 8W | 3000K | 370 lm Results Results Lighting scheme Area avg Lux Uniformity Area avg Lux Uniformity Cylindrical Cylindrical Lighting scheme Area avg Lux Uniformity Area avg Lux Uniformity Cylindrical Cylindrical Task = desk Task = desk surroundings surroundings illumination / horizontal Task = desk Task = desk surroundings surroundings illumination / horizontal avg Lux illuminance avg Lux illuminance Recessed scheme 544 0.85 543 0.66 214 0.39 Pendant scheme 566 0.70 415 0.63 182 0.32 16 Lighting for BREEAM Lighting for BREEAM 17 Floor standing uplighter scheme The Uplighter scheme has used the SmartBalance foor standing luminaires with 80% uplight and 20% downlight distribution and micro-lens optic. This provides a fexible solution if desks are moved around the space at some point in the future. Floor Plan: Luminaires SmartBalance free foor standing* LuxSpace Mini Round recessed downlight 106W | 4000K | 11800 lm LED 12W | 4000K | 1076 lm *(80% up/ 20% down) with micro lens optic Overall Results • In each scheme the lighting is designed to deliver over • W all lighting exceeds standards for illuminance and Results 500 Lux (average, maintained) to the desktops, with uniformity and provides efective balance to day-lit excellent desktop uniformity. windows. Lighting scheme Area avg Lux Uniformity Area avg Lux Uniformity Cylindrical Cylindrical • O ption 2 has individual task lighting, which adds about • Cylindrical illuminance has been calculated in sample Task = desk Task = desk surroundings surroundings illumination / horizontal 200 Lux to the task when used and contributes to the areas at 1.2m height in four diferent directions. These are avg Lux illuminance BREEAM Credit for controllable lighting. The pendant described as an average in the results table above. Floor uplighting 667 0.66 505 0.46 242 0.36 scheme therefore provides over 350 Lux as a background • Occupancy and daylight controls reduce energy scheme light level, with an additional contribution from the users’ use even further. desk lamps, when necessary. The combination of task and overhead illumination exceeds the EN12464-1 minimum illuminance recommendation. Additional Information: In each of the schemes, the luminaires form two rows (or 40sqm). Each row of luminaires closest to the parallel to the window wall. This provides excellent windows is on a separate daylighting control zone and task coverage and uniformity for fexible location of the independently dimmed so that the target illuminance is workstations, while allowing for daylight control. maintained on the work surfaces when daylight is available. Low-wattage, desk-mounted TaskFlex luminaires provide Specifc connected loads: individually controllable lighting to suit people’s personal Recessed Fitting Scheme: preferences, as well as for more difcult visual tasks on the 5.63 W/sqm = 1.06 W/sqm/100 lx pendant-ftting scheme in Option 2. Pendant Fitting Scheme (with task light): A line of low wattage LuxSpace LED downlights illuminate 5.62 W/sqm = 1.35 W/sqm/100 lx the interior wall, balancing window brightness and enhancing the primary circulation path. Floor Standing Uplighter Scheme: 6.21 W/sqm = 1.30 W/sqm/100 lx In any large, open work area, you should divide your ceiling lighting into smaller zones for occupancy-based control – no larger than approximately four workstations 18 Lighting for BREEAM Lighting for BREEAM 19