Lighting in Design Q3 2019

and perform not only in sub-zero tem- perature conditions, but also in areas of very high humidity.” All the lighting throughout the facility is controlled via occupancy sensors which control the output of the fittings by dimming down or ramping up to full output based on detection of people in the vicinity. This reduces the overall lighting consumption by up to 70%. As the facility operates 24/7, the external yard lighting plays an important part of the functionality of the facility, and the external lighting design had to allow for night-time use without lighting spill or glare. Each different area’s requirement informed the specification of the light- ing. By analysing the primary design parameters of light levels (lux), light fit- ting mounting heights, equipment and racking layouts, environment (operating temperature and humidity) and surface reflectance (walls, floor and ceiling), Converge Consulting developed a light- ing schedule of fittings with different light outputs, beam angles and enclo- sures to suit. “By designing according to fixed layouts we were able to ensure that the necessary lux levels were al- ways achieved by changing the output and beam angles of the light fittings to direct the light as required,” says Bright. In the cold storage areas a com- bination of linear LED high bays (with different beam angles) and low tem- perature, waterproof LED luminaires was installed.The offices were lit using recessed LED panels in the suspended ceilings with 6W and 14W LED down- lights in bulkheads and skimmed ceil- ings. Decorative suspended LED strip lighting at different angles was installed at reception and in the boardroom. The external yard lighting was also important and floodlights with cut-off diffusers were installed to limit glare and lighting spill from the facility. Play of light on the façade On the eye-catching façade lighting, which was achieved through a combi- nation of waterproof linear LED fittings with narrow beam angles to wash the façade and wide beam angles to back-

Photographs: Francois Swanepoel.

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LiD Q3 - 2019