Lighting in Design Q3 2019

Photographs: Tessa Brunette/Arup

‘wrapping’ nature of the vertical screen element. Illuminating these vertical fins on the park facing façade screen highlighted the ‘layered’ nature of the building and accentuated the lightness of the glass office ‘blocks’.The dynamic digital control for this lighting component created ‘moving lines’ of light and resulted in a lively animated effect when viewed from the adjacent Chris Saunders Park.This illumination was achieved through a complex Digital Multiplex (DMX) control system which required an extensive testing and commissioning process with specialist sub-contractors. Lighting the square The public square area is in effect a ‘void’ space created by the collection of ‘blocks’ forming the development. In order to further enhance these blocks and voids after dusk, the lighting strategy for the square took inspiration from the built form with different layers and volumes of light including recessed, flush and extruded forms. The perimeter glow from the retail units was supplemented by lit elements within the piazza such as up-lit trees providing visual interest in the vertical plane, integrated bench lighting and lit floor tiles and restaurant tables. Thewrapping façade screen flows into the piazza forming a ‘slatted’ backdrop to the space.The oppor- tunity was again taken to digitally animate the linear light elements in this façade screen creating various light scenes and visual intrigue for users of the space.

The tall form of a central stair tower with ad- joining amphitheatre creates the largest ‘block’ of the hierarchy within the square. Just as a fountain or sculpture can be the centrepiece of an external space, this lit ‘volume’ has become a key focus after dark with the incorporation of feature colour changing lighting. Sustainability in design Park Square was awarded a 4-star Design rating by the Green Building Council of South Africa (GBCSA). Nedport has subsequently committed to targeting a more ambitious 5-star As-Built rat- ing. Lighting plays a critical role in achieving these objectives. Preliminary calculations show that project will achieve a 36% reduction in energy consumption over the Green Star benchmark. Contributing to this is the fact that lighting design to the internal office spaces was in accordance with green star best practice principles. Both passive and active strategies are being implemented to achieve this target. Good daylight levels, coupled with the use of occupancy sensors for switching, saving energy when unused have been applied; lighting zones in the office space will not exceed 100 m 2 thereby al- lowing light for occupied spaces only; LED sources have been utilised for additional energy efficien- cies – these are all factors that ensure that energy efficiencies are optimised.

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LiD Q3 - 2019