Building R4B - BaRangaRoo South EXtERnal lighting dESign ...

ElectrolightMelbourne | Sydney San Francisco [email protected]

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Building R4B - BaRangaRoo SouthEXtERnal lighting dESignlight SPill Mitigation StRatEgYPRoJECt 2753 REviSion C18 SEPtEMBER 2020 PREliMinaRY

© Electrolight - Melbourne | Sydney | San Francisco Building R4B - Barangaroo South | Preliminary Light Spill Mitigation Strategy | Project 2753 | Revision C 18 September 2020

1. introduction & Scope 3

2. Spill lighting Mitigation - Key design Principles 4

3. External lighting design Strategies 5

4. design Standards & assessment 6

5. Summary & Conclusions 7

1 - Visualization - Building R4B, Barangaroo South light SPill Mitigation StRatEgY ContEntS


1 - Block 4A in relation to Barangaroo South

Source: Lendlease

This Strategy report is intended to outline to key stakeholders (including the Sydney Observatory) the lighting design approach and associated mitigation strategies that will be incorporated in the final design in order to minimise the impact of light spill on the surrounding environment.

Upon completion of the design, a further detailed Lighting Impact Assessment Report (with supporting calculations) will be submitted to stakeholders to demonstrate compliance with the design approach, mitigation strategies and relevant standards contained within this report.

This report supports a State Significant Development (SSD) Development Application (DA) submitted to the Department of Planning, Infrastructure and Environment (DPIE) pursuant to Part 4 of the Environmental Planning and Assessment Act 1979 (EP&A Act). The Amending SSD DA seeks to modify the approved 60-storey Residential Building R4B (SSD 6965) by increasing the overall building height to 68 storeys and increasing the gross floor area (GFA) of the building by 5,650sqm.

Barangaroo is located on the north western edge of the Sydney Central Business District (CBD), bounded by Sydney Harbour to the west and north, the historic precinct of Millers Point (for the northern half), The Rocks and the Sydney Harbour Bridge approach to the east; and bounded to the south by a range of new development containing large CBD commercial tenants.

The Barangaroo site has been divided into three distinct redevelopment areas (from north to south) – the Headland Park (Barangaroo Reserve), Barangaroo Central and Barangaroo South. The Residential Building R4B site is located within Barangaroo South. The site of this proposed DA is located on land generally known and identified in the approved Concept Plan (as modified) as Block 4A, as shown in the Figure 1 on the left of the page

Electrolight were engaged by Lendlease to undertake the external lighting design of the front of house spaces for the R4B Building at Barangaroo South, including:

• Ground floor external perimeter awnings and entry

• “Strada” Awning

• Level 2 Pool Terrace

• Typical Apartment Wintergardens

While detailed design of the external lighting is yet to be finalised, the design has progressed sufficiently to enable us to provide a Preliminary Light Spill Strategy, as required in the Amending SSD Development Application for Building R4B at Barangaroo South.

1. intRoduCtion & SCoPE


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1 - Visualization - Building R4B, Barangaroo South

The design aspirations of Building R4B at Barangaroo South are to provide a relaxing and comfortable residential oasis in the heart of the city. These aspirations are well aligned to the key design principles for spill lighting mitigation, namely:

• Low target lighting levels for external environments to create an intimate and comfortable atmosphere, whilst still meeting safety and security requirements. This avoids over-lighting of spaces and minimises emission of waste light into the atmosphere through indirect reflection off surfaces.

• Use of latest technology luminaires with precise optical and glare control, including full cut-off (zero uplight) lighting distribution where fittings face the sky.

• Use of an advanced digital lighting control system to dim luminaires, both to prevent initial over- lighting and to adjust illumination levels based on occupancy, including time based control strategies.

• Use of warm colour temperature light sources (correlated colour temperature 2700K) to minimise the scattering of light in the atmosphere from shorter light wavelengths (ie blue light).

• Designed in accordance with relevant Standards and Guidelines, including AS4282: Control of the obtrusive effects of outdoor lighting - refer Section 4.

2. SPill lighting Mitigation KEY PRinCiPlES


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1 2

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1 - Intimate residential terrace environment with selective application of light

2 - Low level general lighting to external landscape areas (full cutoff)

3 - Low level task lighting to external tables (full cutoff)

4 - Landscape lighting (full cutoff)

5 - Low level floor wash lights for general circulation

6 - Modern luminaires with advanced optics and glare control

As the external lighting design of the R4B Tower progresses from concept through to detailed design, lighting calculations and modelling will be undertaken of all areas to determine the potential spill lighting impacts to the neighbouring properties (including the observatory). This will help inform final luminaire selections and the associated lighting control philosophy, in order to minimise obtrusive lighting effects.

The Key Design Strategies to minimise obtrusive lighting effects to the surrounding environment include:

• A design process based upon deliberate and selective application of light on target objects/surfaces to create light and shadow, rather than blanket even illumination of all areas. This avoids over-lighting spaces and reduces associated spill light into the environment.

• A design process that seeks to create an intimate and atmospheric residential environment, with lighting levels that are on the lower end of the acceptable range, but which still satisfy safety and CPTED requirements. This minimises spill lighting into the environment, including from indirect reflection off illuminated surfaces.

• Not floodlighting the building facades through direct application of light. Activation of the building envelope comes from the internal illumination of the apartments and communal spaces as seen through the windows of the facades. This provides a far more sympathetic and minimal lighting impact upon neighbouring properties.

• A design process that encourages and enables transparency and views from the R4B tower to the surrounding environment. This limits the use and selection of luminaires at the perimeter edge of the building which may cause veiling lighting effects (or be directly visible from outside of the building), which in turn reduces the potential light spill into the surrounding environment.

• Selecting modern luminaires that have precision optics and are full cut-off (zero uplight) when mounted outside. Utilisation of glare shields, louvres and baffles on luminaires where required to reduce or eliminate spill light leaving the site.

• Use of warm white 2700K light sources for all external luminaires to minimise light scattering in the atmosphere from blue light.

• For the level 2 terrace space, a preference for low level mounted luminaires that provide targeted illumination to the task surface, rather than high mounted pole tops or floodlights.

• Use of a digital lighting control system which enables individual dimming of each luminaire to allow fine tuning of the installation at initial commissioning stage to prevent over-lighting of the spaces. This shall be combined with timeclock controls that will switch off non-essential lighting during after hours operation.

• Use of occupancy detection (such as motion sensors) in conjunction with a digital lighting control system to dim or switch off external lighting when the space is unoccupied.

• Design shall be assessed and designed in accordance with AS4282: Control of the obtrusive effects of outdoor lighting and a detailed Lighting Impact Assessment report will be provided. This report will address the impacts upon the neighbouring properties, including the Sydney Observatory.

3. EXtERnal lighting dESign dESign StRatEgiES


The lighting design for Building R4B at Barangaroo South references the following design standards and guidelines:

• AS/NZS 4282 – Control of the Obtrusive Effects of Outdoor Lighting (1997)

• AS1158.3.1 Lighting for Roads and public Spaces (2005)

AS4282 provides design limits to minimise obtrusive lighting effects to nearby residents, transport systems and astronomical observations. The metrics in the standard to assess these impacts are:

• Vertical Illuminance (the amount of light entering residential dwellings)

• Luminous Intensity (brightness caused by viewing a light source directly)

• Threshold Increment (glare to road users caused by bright light sources)

The design limits of the above are dependent on the area the lighting is situated in. Under the Standard, the development is located in a Commercial area (or at a boundary of commercial and residential areas), meaning the following design limits apply:

Pre Curfew Periods (6am to 11pm)

• Illuminance - 25 lux at relevant residential boundary

• Luminous Intensity - 7500 cd

• Threshold Increment - 20% (adaptation luminance 10cd/m2)

Curfew Periods (11pm to 6am)

• Illuminance - 4 lux at relevant residential boundary

• Luminous Intensity - 2500 cd

• Threshold Increment - 20% (adaptation luminance 10cd/m2.

The final external lighting design for R4B Tower will not exceed the values outlined above in order to comply with the requirements of the Standard. Detailed calculations will be provided to demonstrate compliance with the limits above in a latter design stage.

Astronomical Assessment - Sydney Observatory

The effects of light spill on astronomical observations can be broken down into two main categories: direct light from the installation falling directly on to the Telescope/s and a lightening of the night sky caused by scattering of stray light in the atmosphere ie “Sky glow”. The nearest Observatory is Sydney Observatory at Observatory Hill, approximately 350m away from the site and will form the basis of the assessment.

AS4282 states that if the installation complies with the limits under the standard, then the effects of direct lighting falling on to the Telescope/s will be mitigated. As the final lighting design will comply with the AS4282 limits, it can be inferred that no direct light will detrimentally affect the Observatory.

Sky glow is common in urban areas and is less readily controlled. Any light source visible in the environment, including light from buildings, street lights, car head lights etc will cause sky glow. As observatories desire the lowest possible amount of sky glow, and urban environments (such as the Sydney CBD) by their very nature produce large amounts of sky glow, the question becomes one of what is deemed reasonable by both parties. The growth and development of Sydney City cannot be expected to be unreasonably constrained by the requirements of an observatory, nor should individual urban developments significantly impact upon the successful operation of an observatory.

The proposed external lighting design of R4B Tower is intimate, restrained and utilises fully shielded light sources of low intensity as outlined in Section 3. Furthermore, there is no decorative lighting proposed for the facades of the building. The amount of light emitted from this development can be viewed as small when compared to other commercial towers located nearby (particularly those with facade lighting). Given the existing ambient night time lighting environment of the CBD, it is unlikely that the impact of any potential spill light from the proposed facade lighting would be detrimental to the Sydney Observatory. The final external lighting design will employ all of the mitigation strategies outlined in this report to ensure the impact to the Sydney Observatory is minimised as far as practicable.

4. dESign StandaRdS &aSSESSMEnt

CaSa Manual of Standards Part 139 – aerodromes

The lighting design for Building R4B at Barangaroo South has been assessed against CaSa Manual of Standards Part 139 – aerodromes - Section 9.21 to determine the impact on nearby airports and associated incoming and outgoing aircraft, if any. Since the development lies outside of the 6 km radius of the nearest airport (Sydney airport), it is deemed to have no impact on the airport or aircraft.

AS1158 - R4B Building Perimeter - Ground Plane

The lighting to the perimeter ground plane of R4B has been designed in accordance with Lighting Subcategory “P7” of AS1158.3.1 (2005) as outlined in the Barangaroo Lighting Masterplan developed by Spiers and Major. External building perimeter lighting will be dimmed to ensure that this minimum illumination level is not significantly exceeded, to reduce the obtrusive lighting impact to neighbouring properties.


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1 - Sydney Observatory, Milles Point

The detailed design of the external lighting for Building R4B at Barangaroo South is yet to be finalised, however this Preliminary Light Spill Mitigation Strategy Report outlines the necessary principles and design strategies that will be adopted to ensure that obtrusive lighting effects to the surrounding properties (including the Sydney Observatory) are minimised.

Upon implementation of the outlined strategies, we are confident that the final lighting design will comply with the necessary Standards and minimise light spill to the local environment. This will be demonstrated by a further detailed Lighting Impact Assessment Report (with supporting calculations).

5. SuMMaRY & ConCluSionS

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