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Lighting : April May 2011
April/May 2011 | LIGHTING MAGAZINE 73 Typically where a major international rock show such as the Rolling Stones would have used up to 4 MW of power, they will now only use 2 MW. The advent of ceramic arc technology has allowed smaller 3200K sources to be developed for use in television and film applications. Along with the evolution of high CRI fluorescent tubes this has resulted in large energy savings for studios that operate on a 24/7 basis. These sources appear to be developing further which will allow a far greater acceptance throughout the industry. As well as the abovementioned technological advances the entertainment industry has embraced LED lighting with fervour. LEDs are being used not only as direct sources of illumination but as high intensity video screens that in some cases become light sources themselves. This has led to the creation and control of lighting and video being undertaken by the lighting designer. A recent tour by the UK band, Radiohead, was entirely lit by LED sources and LED screen technology. This show used 140kW of power instead of around 500kW for conventional metal halide type lighting. In a recent television show that I lit, I used 60 LED luminaires with a total power consumption of 25kW to replace a conventional tungsten-based lighting rig of 220kW. FIGURE 3. GLP’s Impression Zoom 120 RZ LED moving lights. (Photo: A .C . Entertainment Technologies Ltd) ➤ As efficacies and CRIs of LEDs increase we will see much greater use of these sources in the entertainment industry as in general lighting. The entertainment industry needs to consider ways to lighten its lighting driven electrical load and to think about the disposal of harmful waste. As an industry we need to consider the whole impact of our productions. Some present examples are the Radiohead tour I have mentioned that, together with the lighting initiatives, used a number of other carbon conscious choices. The band appeared at venues close to public transport. In Atlanta, for example, the promoter offered any ticket holder who had evidence that they had used public transport to travel to the concert, early entry to the show. As well it was decided to have a package of equipment on either side of the Atlantic to save shipping it. On the road Euro5 compliant trucks were specified, that ran on biofuel reclaimed from used oil. An example of a total commitment to carbon neutrality is the Arcola Theatre in the East End of London. It has worked with the London City ‘Greening London Theatre’ initiative to achieve its goals. A hydrogen fuel cell power supply was used, along with low energy LED and tungsten lighting in addition to double-glazing, draught proofing, biomass boiler, rainwater collection and solar cells. It has also worked closely with suppliers to incorporate their carbon neutral initiatives (Figure 2).
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