The office space on level 12 of Tower 42 in the City of London is one of the first in the UK to use all solid-state lighting.
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a light that provides a certain number of lumens/Watt’ – with no regard to how many are used or how they might best be controlled. Many might argue that the sheer tolerance and
adaptive ability of our eyes will overcome such lighting designs and allow us to use ‘energy efficiency’ to the detriment and exclusion of ‘lighting quality and innovation’ – something which should be resisted. Over the last few years there have been a number of
studies carried out surrounding the use of fluorescent lighting with very high correlated colour temperatures, where the appearance of the lamp is almost blue. The basic premise being pursued is to emulate what happens with daylight, which changes in both intensity and colour from sunrise to sunset, every day. Studies have already shown that the application
of 17,000 degrees-Kelvin fluorescent lighting to office lighting has shown marked improvements
Blue sky Study shows benefits for work performance
Blue sky lighting involves the use of fluorescent lighting with very high correlated colour temperatures, where the appearance of the lamp is almost blue. The idea is to emulate natural daylight, from sunrise to sunset. A number of studies conducted into blue sky
lighting seem to prove it has a number of benefits in the workplace. One such study was conducted at RS Components in London. It involved more than 90 participants and used a cross-over methodology to minimise any effects brought about by the
knowledge that research was being undertaken. In addition, the study took place during the winter months between January and March 2007, to minimise any impact that the longer spring and summer days might have had. The system used involved Savio remote phosphor LED light fittings; LuxSpace Mini; and Light Master Modular. The results revealed improvements in work
performance and alertness. Participants also reported better sleep patterns as well as reductions in eye strain, discomfort, fatigue and blurred vision.
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CIBSE Journal May 2010
www.cibsejournal.com
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