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LIGHTING BSEE
THE CASE FOR ENERGY EFFICIENCY Upgrading your lighting scheme
David Neale, UK Product and Marketing Manager at Feilo Sylvania, looks at how technology is changing the way we light buildings.
Rapid improvements in the quality, performance and life expectancy of lighting solutions in general, combined with cutting edge lighting control systems, provides the user with optimum energy savings. As a result, we are able to create stimulating, well lit buildings whilst also being conscious of the maintenance and running costs of an installation and the longer term effects it has on the environment. Technology is also pushing the boundaries of what lighting can do and luminaires are becoming more intelligent.
T It’s all about efficiency
It will come as no surprise to learn that lighting accounts for more than 20% of a building’s energy consumption. It consumes more energy than the heating cooling and ventilating systems and even the IT network. So, we need to make the lighting work as efficiently as possible.
As we know, LED technology has had a big impact on the cost and efficiency of a lighting scheme. There are many variables that affect how much energy will be saved by replacing a traditional lighting system with LEDs, such as how much energy the existing system consumed, if a lighting control system is used and its operational hours. A commonly used statistic is that an LED lighting installation could save you 30%-50% on your electricity bills. However, careful design using fewer luminaires with a higher output can reduce installation costs and this aspect should not be ignored. LED luminaires are also a great retrofit solution; they will reduce installation complexity and time spent on the job. Crucially, it also reduces down time for your client. Working at hard access points or high ceilings usually requires the immediate area around the installation to be safely sectioned off, and the longer the install takes the more disruption caused for the client. For example, the University of Southampton required a highly efficient lighting scheme but also had some tricky spaces where LED was the ideal choice. High efficiency and reliability were the top priorities for the new lighting as the existing scheme was more than 25 years old, and had become inefficient and outdated. CEI Electrical and P&J Electrical were the electrical contractors on the project and selected a combination of products including Concord’s Unity, Mini Continuum LED and Myriad Square. As well as their energy efficiency, the maintenance of the luminaires was also a key factor in the decision to select Concord luminaires, particularly in cases where there were high ceilings with difficult access. “We wanted a lighting solution that would provide a unique look, complementing the architecture of the building while still providing the energy saving benefits we needed,” says Ray Smith, Electrical Design Engineer at University of Southampton. “Compared to the previous lighting installation, which consisted largely of T8 fluorescent luminaires controlled by simple switching, the combination of LED luminaires with occupancy sensing controls has provided us with an overall saving of 20% on our electricity consumption, which is fantastic. We are delighted with the new scheme and look forward to continued energy savings.”
Seventy-five Concord Unity direct/indirect luminaires were utilised extensively in library study areas and a further 200 were installed in the lecture theatres and circulation spaces within the University’s Avenue campus to deliver optimum visual conditions for the students. The circulation spaces feature a combination
uA combination of LED luminaires with occupancy sensing controls provided the University of Southampton with an overall saving of 20% on its electricity consumption.
of Unity, Mini Continuum and Myriad Square with Mini Continuum also featuring in the refurbished refectory, offering outstanding performance and distribution of light. Additionally, concealed Sylvania LED battens have been used to provide a wash effect on the ceilings in corridor study areas.
Taking control of your lighting
As the efficiency of LED products is now widely accepted, and the increase in the use of these products is very welcome. However, there will never be a more efficient light than one that is switched off when it is not needed. Lighting controls enable this, and present a new challenge for architects, specifiers and building services engineers.
Software enables configuration of lighting groups, and control of individual luminaires, with the integration of sensors provides a smarter, more sophisticated lighting scheme.
There are so many different options for controls that every type of building, new and old, can benefit from the right products. Electrical contractors can benefit greatly from working closely with the system programmers, understanding how to get the most out of the lights installed. At the other end of the scale are plug and play style options, with no hard wiring required. Standalone systems provide increased energy savings from a reduced installation time, a win-win situation.
Controls are not just about switching the lights off. A control system which has been designed to work in conjunction with a lighting scheme can ensure that a lit space is as comfortable as possible to occupy, with lighting levels appropriate to the tasks being undertaken in the space. Additionally, controls can add a dynamic element to a lighting scheme: whether that's colour- temperature control so that the atmosphere of the space varies according to the time of day, or simply to change the scene/contrasts in an area. Selecting the right lighting can have a huge impact on the efficiency a building and the comfort of occupants. Now is the time to take advantage of the latest technology and upgrade your lighting scheme.
www.feilosylvania.com/en-gb/
here is no escaping the requirement for lighting in a commercial building, whether it comes from natural or artificial sources, we need it. For operational requirements right through to the comfort and well-being of occupants, lighting is a vital element of a new build or refurbishment project.
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www.bsee.co.uk BUILDING SERVICES & ENVIRONMENTAL ENGINEER OCTOBER 2017 15
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