Neal Paley, specialist lighng designer at TÜV SÜD’s UK Real Estate division, an internaonal building services engineering consultancy, specialising in sustainable MEP (mechanical, electrical and public health), BIM (Building Informaon Modelling), lighng design, and vercal transportaon, looks at how lighng design can infiuence energy use

five per cent of greenhouse gas (GHG) emissions. Consequently, governments around the world are reacting to reducing energy consumption by adopting regulations that mandate minimum energy efficiency requirements for lighting products. High-efficiency lighting technologies offer up to an 85 per cent improvement in energy efficiency compared with conventional lighting technologies, while providing an equal or better quality of light. A host of voluntary certification and labelling programmes enable the identification of the most energy-efficient lighting products, which are consistent with a building’s particular needs. These regulations and voluntary programmes are being continuously updated to reflect the introduction of new lighting technologies that promise even greater energy efficiency.

A Regulatory landscape

Directive 2009/125/EC, also known as the Ecodesign Directive, is the primary regulatory instrument in the European Union (EU) regarding all energy-using products, including lighting products. More than 40 separate product groups are covered under the directive, which reportedly account for approximately 40 per cent of all greenhouse gas emissions generated in the EU. The Ecodesign Directive is complemented by the Energy Label Regulation, which provides a framework for mandatory labelling requirements and other means of providing end-users with product-specific energy consumption information. Together, these establish minimum efficiency criteria for most major categories of energy-using products.

There are also a vast range of country-specific Green Building rating schemes, each having their own ecolabel. For example, BREEAM is the UK property industry’s recognised benchmark for the environmental rating of new and major refurbished buildings.

uEnergy eciency is a key feature of any lighng design

A study from the Building Services Research and Information Association (BSRIA) found that over 40 per cent of construction industry respondents recognised “return on investment” and “operational savings” as benefits of implementing BREEAM (Building Research Establishment Environmental Assessment Method). BREEAM helps building developers and owners manage and mitigate risk through demonstrating sustainability performance during planning, design, construction, operation or refurbishment. This helps to lower running costs, maximise returns through the market value of a building, as well as attract and retain tenants by providing desirable places to live and work.

In the UK, Part L of the Building Regulations (England and Wales) contains requirements

relating to the conservation of fuel and power, and is a direct outcome of the UK Government's Energy White Paper. The commitment within this is to raise the energy performance of buildings by limiting heat losses and excessive solar gains, ensuring that energy-efficient fixed building services are installed, and that the building owner is provided with the information required to maintain the building and its services. The Waste Electrical and Electronic Equipment (WEEE) Directive 2012/19/EU sets collection, recycling and recovery targets for electronic equipment placed on the market. This has placed obligations upon users and producers to handle their electronic and electrical waste more carefully. Such waste can no longer simply be placed in landfill as targets have been set by the European Parliament for member states to recover certain percentages of their waste via recycling facilities. Lighting plays a key role here, as some manufactures charge a WEEE levy at the time of purchasing lighting products, which then goes into the recycling scheme.

Identifying suitable lighting products

In Europe, designers and engineers should look for the CE marking on products such as luminaires, lamps, drivers and other electronic components. This is a manufacturer’s or importer’s self- declaration that the product conforms to European requirements. Such a product should come with a Declaration of Conformity that states which standards the product has been tested to. However, CE marking is not in itself a guarantee of quality, but provides assurance that minimum demands have been met.

Depending on the outcome of Brexit negotiations, at the time of writing this article, it is likely that UK lighting manufacturers will need to replace the CE marking with a new ‘UK Conformity Assured' symbol, for the British market. UK lighting manufacturers will still be able to sell products which have been made and assessed against EU regulatory requirements and which carry a CE marking, for a certain transition period.

Design considerations

Energy efficiency is now a key feature of any lighting design as schemes must meet the latest criteria. However, there are many other important reasons for implementing energy efficient lighting innovations, ranging from the more obvious reduction of power consumption, to benefitting from incredibly low-maintenance requirements and associated costs.


technologies oer up to an 85 per cent improvement in energy eciency

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uImplemenng energy ecient lighng can be a complex procedure

Implementing energy efficient lighting into a well-designed scheme can be a complex procedure, as the lighting designer must ensure that efficient luminaires are used. This makes it necessary to think about the design as a whole, both creatively and technically - from the downlight, associated drivers and right through to the lighting control system. Other technical considerations must also be made, for example not all drivers are fully compatible with every downlight or linear LED, and any dimming may not be smooth, could flicker or not dim down to a really low level without a sharp cut off. However, the design options are endless, as the LED technology evolution is changing so fast. LED light sources are becoming brighter, smaller and more efficient, and double height spaces can now be illuminated to the required lux levels from the smallest of luminaires. Leading lighting manufacturers are also producing ever improving optical systems for luminaires, which is increasing their efficiency.

Wireless lighting is now also a reality across the commercial and residential sectors and is increasing in popularity. Although Bluetooth is still relatively new in the lighting controls world, its mesh technology brings simple wireless control to large installations. The familiarity of Bluetooth and the open protocol nature of the technology will mean its entry into the mainstream lighting market is not far off.

With all of these regulatory considerations, product choice variables and other technical considerations that must be made, the design process should be started early within the building development plans. While the introduction of more efficient lighting technologies has resulted in considerable energy savings around the world, new lighting technologies also create ever-changing regulatory compliance challenges for both manufacturers, designers and end-users.

LIGHTING, LIGHTING CONTROLS & LIFI Reducing the carbon footprint of lighting design

ccording to a report from the United Nations Environment Programme, electricity for lighting accounts for approximately 15 per cent of global power consumption and

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