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[ Green: Lighting ]

scope to reduce carbon emissions by switching to more effi cient light sources. ‘Over the coming years, EU legislation will enforce a

emissions; however, there are huge savings to be made by making the switch sooner rather than later.’ So what lamp types and lighting solutions should contractors be looking at? Well, the buzz in recent years is all about LED technology. While LEDs are not new in themselves – having been used in emergency lighting, street lighting, retail and corridors in offi ce lighting – big improvements in light output and price reductions are seeing the likes of Philips, Thorn and Osram all making moves on LED technology in general offi ce interiors. ‘Major advances have been made with LED interior

gradual phase-out of the most ineffi cient lighting products to reduce CO2

downlights and more recently with modular recessed and industrial fi ttings,’ says Thorn Lighting’s Hugh King. ‘Aside from low energy, there are a number of operational and environmental benefi ts of using LEDs. Their extraordinarily long life (50,000 hours) means they need zero maintenance with no light source replacement, thus reducing through-life costs. In addition colour is excellent, they emit neither UV nor IR radiation, and contain no mercury.’ ‘LED technology is simply moving so fast,’ explains Mike

Simpson, technical director at Philips Lighting. ‘You can’t simply sit back and wait for things to happen. Contractors need to understand this technology, as their clients will be asking for it.’ LEDs differ from conventional light sources in that they are very luminaire-specifi c. ‘Put a chip into 20 different luminaries and you will get 20 different results,’ says Simpson. ‘The industry is working hard to develop good

October revamp for Part L

Energy use requirements are included in the UK Building Regulations, which, as far as lighting is concerned, means Part L (England and Wales), Part J (Scotland) and Part F (Northern Ireland). Signifi cant changes to Part L and Part J come into force in October 2010. Part L splits into four Approved Documents: L1A and B, plus L2A and B, covering new and existing domestic and non-domestic buildings respectively. Beginning with domestic dwellings (L1A and B), there are few real surprises and the revised targets can be achieved with modern equipment. For internal fi xed lighting in frequent locations, three out of four fi ttings must be low energy, which also overcomes the existing confusion arising from the choice of calculation method: by area or number. The effi cacy target increases to greater than 45 lumens/circuit watt, from 40 ie. no GLS or tungsten halogen lamps. Outdoors: maximum wattage permittable comes down to 100W from 150W, with control as before, or you can follow the 45 lumens/W route as above. For new offi ces (including classrooms), industrial and storage areas, the revised

Part L2A will require an improved average effi ciency for the building (excluding emergency and specialist process lighting) of not less than 55 luminaire lumens/ circuit watt (up from 45). This is quite a change and higher than many expected. For lighting serving other interior spaces within these buildings, for instance

corridors, the average initial (100h) lamp circuit effi cacy changes to not less than 55 lumens/circuit watt, up from 50. Display lighting also undergoes a change, with the initial effi cacy target tightening to not less than 22 lumens/circuit watt, up from 15. Existing non-domestic buildings undergoing major renovation (LB2) follow the same calculation method as new builds, except for the retention of the lighting controls factor for offi ces, industrial and storage areas.

Philips Lighting has provided a stunning LED lighting solution, high on visual appeal but low on energy consumption, for the capital’s prestigious Tower 42 offi ce building. This iconic landmark has completed a major

investment and refurbishment of its Level 12 offi ce space, introducing specially customised solid state Savio remote phosphor LED light fi ttings and advanced Light Master Modular lighting controls from Philips Lighting. This is believed to be the fi rst offi ce space in the UK to use all solid state lighting, achieving a signifi cant energy saving of around 40 per cent compared to a conventional T5 fl uorescent installation. ‘We are committed to minimising our environmental impact, while maintaining the quality and high standard of the offi ce facilities we provide. Prospective customers are also looking at energy performance more closely,’ explained Tower 42’s building services manager John Gentry. ‘Consequently, we evaluated a number of options for the lighting on Level 12 and the combination of LED lighting and controls proposed by Philips offered the best overall energy performance and life cycle costs.’

About the author

Andrew Brister Andrew Brister is a freelance journalist and editor. He has been involved in the building services sector for more than 20 years.

guidelines to help people fi nd out what they should be asking when tackling a project.’

Changing times In the retail sector, LEDs are replacing old halogen technology. ‘Halogens are being phased out,’ says Simpson. They only achieve 20 lumens/W whereas you can get 40 lumens/W with LEDs, easily giving you a two to three-year payback. At the display end, LEDs are also very good at achieving a focused spot.’ The fl uorescent solutions in offi ces will take longer to be

made redundant, but Simpson estimates that by 2013 new LED installations will outnumber fl uorescents. Indeed, many are already taking the leap. At a refi t at London’s Tower 42 development, Philips has recently completed what is believed to be the fi rst offi ce space in the UK to use all solid state lighting, achieving a signifi cant energy saving of around 40 per cent compared to a conventional T5 fl uorescent installation. As Simpson says, the situation is changing fast and those

contractors that don’t get involved will miss out. Can you afford to be left behind?

Case study: Philips Lighting and Tower 42 in LED fi rst

Autumn 2010 ECA Today 21

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