The Solution
HOW WE ACHIEVED THE RESULT
It was decided that the lighting equipment for the courts should be provided by Holophane due to their extensive experience of indoor sports lighting. After evaluating the installation and the demanding lighting requirements, the Prismaspace was chosen as the best luminaire to illuminate the courts.
The Prismaspace consists of two optical modules with a patented design feature allowing them to be rotated independently in 15-degree steps. In this way, both the edges and the centre of the courts can be illuminated to achieve the high uniformity, over 70%, required. These optical modules provide excellent volumetric illumination which gives superb visual comfort no matter what the viewing direction.
The luminaires are mounted on the sides of the courts, outside the Total Playing Area (TPA), and thus cannot obstruct a view of the tennis ball even when a player hits a high lob. In addition, the units are fitted with a high angle shield design feature which both protects the prismatic diffusers and importantly minimises the discomfort glare for the court users. The Neutral White 4,000K LEDs have a colour rendering index, CRI of >80 which means that the whites and colours of the players’ appear bright and easily recognised.
In terms of the reduction in maintenance, the rated life of the LED module used in the Prismaspace is 100,000 hours (L70B50@25°C) meaning that they last approximately six times longer than a typical fluorescent lamp used in many large indoor arenas. The electrical load of the new installation is approximately 30% less compared with the old fluorescent installation. It was also found that, when installed, the achieved illumination levels were higher than the 750 lux required and so the new Prismaspace were dimmed a further 20%.
The lighting is controlled by a DALI Broadcast system with a master switch and presence detection. If no movement is detected after 10 minutes, the luminaires are dimmed to just 2% light output and this acts as visual guidance for anyone in the space. A total of 64 No 214W Prismaspace luminaires are installed on the two courts. The lighting design was carried out by Holophane’s design team in conjunction with Tivalux, who are Holophane’s partner in Sweden.