Lighting : Lighting April 2016 - Vol 36 Issue 2
44 LIGHTING MAGAZINE | April/May 2016 April/May 2016 | LIGHTING MAGAZINE 45 INSPIRED BY LIGHT: CLOSE OF THE INTERNATIONAL YEAR OF LIGHT The International Year of Light and Light-based Technologies 2015 celebrated its closing ceremony on 4-6 February 2016 in the city of Mérida, Mexico. During three days, over 300 participants reviewed the activities and major outcomes of the IYL 2015 as well as discussed potential legacies of the Year. The academic programme was opened by Ana María Cetto, Chair of the IYL 2015 Committee in Mexico. John Dudley, Chair of the IYL 015 Steering Committee, gave an overview of the activities developed during the Year. Most notably he highlighted the international coverage of the year with the organisation of over 5,000 activities, including scientific conferences, art projects and exhibitions, active learning workshops, festivals and many more, in 148 countries. The international impact was also shown by the over 150 partners involved on the organisation of the IYL 2015 and more than 15,000 media mentions in 120 countries. The programme of the conference included lectures and panel discussion by eminent specialists, comprising two recipients of the Nobel Prize in Physics: Shuji Nakamura and John Mather. The different sessions during the closing ceremony addressed the many ways in which light touches us, and of its centrality in our lives. Topics included health and life science, architecture and urban environments, new light sources for research, optics and phototonics, cultural heritage, light pollution awareness and science education. Among the potential legacies discussed for IYL 2015 were the initiative to request the designation by the United Nations of an International Day on Light and Light-based Technologies, the commitment to keep the successful UNESCO’s Active Learning in Optics and Photonics programme running in the future and the strengthening of the collaborations between the organisations involved in the organization of the IYL 2015. The ceremony was officially closed with a visit to the archaeological site Chichén Itzá, where participants learnt about the ancient Mayan culture and its knowledge of the Universe with two talks from prominent archaeo- astronomers as well as a light and sound show over the Temple of Kukulcan. Even though the IYL 2015 is officially closed, its spirit is very much alive. With many activities still happening around the world, for instance France is organising activities until the end of June 2016 to match the school calendar, it is essential to take advantage of the momentum generated and keep walking through the path illuminated by the International Year of Light to ensure a better tomorrow for all. A light and sound show at the Temple of Kukulcan was part of the IYL 2015 closing ceremony. LIGHTING GUIDE 6: THE EXTERIOR ENVIRONMENT (SLL LG6. LG06) Since the last edition of this guide (The Outdoor Environment) in 1992, there has been a surge of interest in lighting the exterior environment – in particular, light pollution, energy use and long- term sustainability have become more pertinent than ever. In the 1990s, LEDs that could produce a functional amount of light were not available. This technology will continue to develop and there is a strong expectation that it will replace conventional light sources. The guide aims is reflect these changes to provide readers with a firm foundation from which to approach exterior lighting design. Since light source technology is advancing rapidly, the guide provides a holistic approach to the design of the exterior environment, rather than concentrating on product performance, which quickly becomes out of date. One of the major differences between this current guide and the previous edition is the emphasis on environmental and energy issues. Digitally controlled lighting is becoming an increasingly important facet of lighting design. Another major difference is the growing use of solid state lighting (SSL). This normally refers to LEDs, although other SSL sources are being introduced. The guide was written by Alan Tulla, published in 2016 and has 104 pages. It is available in print or as a pdf. The pdf (ISBN 9781906846695) is free to CIBSE members and costs non-members £72. The print version (ISBN 9781906846688) is £40 to CIBSE members and £80 to non-members. CREE ACHIEVES HIGH R&D LED EFFICACY WITH SUPERIOR COLOUR QUALITY Cree has recorded another LED industry first with the demonstration of a single high-power LED delivering nearly 1,600 lumens at 134 lm/W with colour quality similar to that of an incandescent lamp. Cree achieved a breakthrough 25% increase in lm/W over production LEDs of similar colour quality under operating conditions found in real-world LED lighting applications. Many of today’s LEDs that provide excellent light quality do so at the expense of LED efficacy, resulting in lower system performance or higher A CCT of 2700 K with a CRI of 90+ and also an R9 of 90+ are important properties to guarantee incandescent-like illumination quality. system cost. As an example of what Cree’s technology could achieve, a current 60W LED replacement lamp, with average light quality (3000K CCT and 80 CRI), could be upgraded to incandescent-like light quality (2700K CCT, 90+ CRI and 90+ R9) with the same light output and power consumption at no additional cost. Cree reports that the R&D LED performance was measured at 1587 lumens at 350 mA and junction temperature of 85°C, delivering 134 lm/WwithaCRIRa>90andR9>90 at 2700 K CCT.
Lighting February 2016 - Vol 36 Issue 1
Lighting June 2016 - Vol 36 Issue 3