[ Focus: LED lighting ]
less energy than standard methods, with some manufacturers reporting even higher rates. Ian Major, product and marketing manager at Havells-Sylvania, says: ‘Our new RefLED 5.5W GU10 LED lamp produces the same light as a 50W halogen, but uses 90 per cent less energy.’ Philips also recently announced the development
of what it describes as ‘the world’s most energy- efficient warm-white LED lamp’. It is a tube lighting prototype that produces 200lm/W of high quality white light – compared with 100lm/W for fluorescent lighting and just 15lm/W for traditional light bulbs. LED lamps can also be linked to dimming systems
and presence detectors, enabling even further energy savings. With conventional lamps, particularly fluorescent or discharge-based, this is not possible because the lamps take some time to warm up and their lifetime is greatly reduced by frequent switching. It has also been discovered that further energy
savings can be delivered by voltage optimisation (VO). Testing commissioned by the ESTA Voltage Management and Optimisation Group, and analysed by EA Technology, examined the effects of supply voltage on LED light output and power use. It found that optimising the incoming mains voltage by 10 per cent, from 245V to 220V, delivered an eight per cent saving in watts used by LEDs, but only a one per cent decrease in lumens – lighting brightness is barely affected, yet energy usage is significantly lowered. Jeremy Dodge, head of marketing and technical
Services at Marshall-Tufflex, which produces the Voltis and Voltis Home range of optimisers, says: ‘This study challenges the view that VO will reduce lighting performance but only deliver very low savings on LED lighting.’
2. It is the leading green lighting solution The targets for carbon reduction in the UK are
LED lighting is on the radar of everybody – from multinational corporations down to homeowners – as a key method of saving energy and money
deliberately tough. The long-term framework outlined by DECC sets out plans for achieving the objectives stated in the Climate Change Act 2008 that, when compared with 1990 levels, equates to a reduction of at least 34 per cent by 2020, and at least 80 per cent by 2050. LED lighting will play a huge part in helping
to achieve these targets and, to put things into perspective, it is estimated that if only half of worldwide lighting was converted to LED by 2025, power use would be cut by 120GW, saving £66bn a year and reducing carbon dioxide emissions from power plants by 350Mt over the same period. LEDs are also environmentally friendly, as they are
100 per cent recyclable and free from mercury and other hazardous chemicals that are harmful to the environment.
3. LEDs are long-lasting and versatile LEDs can last up to 25 times longer than a standard incandescent bulb – anywhere between 50,000 and 90,000 hours. They are also flexible and highly versatile, and can be used in a wide range of everyday appliances, as well as streetlights, emergency lighting, floodlights and vehicles.
4. LEDs offer excellent colour quality, temperature and consistency Compared with CFLs, LED lamps offer a much better colour rendering, especially when it comes to reproducing red colours. From September 2013, LEDs with a colour
rendering index (CRI) below 80 will be banned from sale in Europe. Ian Major of Havells-Sylvania, says: ‘This step was felt to be necessary because some manufacturers are offering low-cost LED products with very poor colour quality that, if left unchecked,
LED lighting is flexible and highly versatile
New wider lenses create a lighter, brighter and
fresher appearance
June 2013 ECA Today 47
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