Lighting : LIGHTING Apr-May 2018
6 LIGHTING MAGAZINE | April/May 2018 FROM THE EDITOR It has been interesting preparing this issue of Lighting with its theme of daylighting – interesting because the last year or so has seen huge interest in “human-centric” lighting, lighting for “wellbeing” and the mystical “circadian lighting” all of which you might imagine would be concerned with access to daylight and sunlight. You may have expected that this bandwagon, nay juggernaut, would have been talking up the advantages of getting not just views out of buildings but of getting daylight in for entrainment (of our body clock, which if left to its own supervision, seems to like to free-run, with a cycle of greater than 24 hours). You may have been fooled into thinking: “at last we will get good window and rooflight design because daylight is essential to maintain our circadian rhythms – daylight is good for our wellbeing; it is truly human-centric rather than the static (in every sense) electric lighting.” Ah, you would be so wrong. Daylight barely receives a mention. What is promoted is purpose-designed “human-centric” lighting, using LEDs with lots of colour changing as well as dimming. You can “design” it yourself. Because it is LED, it will be energy efficient – none of that heat associated with daylight and none of that annoying variation due to clouds, the time of day and the season of the year. It will be like the other electric lighting – static but this time with static-variability (feel free to make use of this emerging concept). So, the solution is not to design and construct buildings that are appropriate to their environments and to the availability of daylight but to carry on ignoring daylight as a design element and resource in favour of gloomy, unstimulating, inhuman-centric, electric-only lighting. It is not easy to design large buildings that can make use good of daylight but it’s not impossible. Architects and developers might have to consider whether a glass box is the ideal building for all locations on the planet (as many appear to think at present). And, as I’ve mentioned many times before, everywhere on the Earth daylight is available for only 50 percent of the time. Actually, it is probably less because utilisation of the low angle sun and sky is difficult to achieve. However, the point is that daylight is not a threat to electric lighting since it is needed for the other 50 percent of the time. It is also needed in windowless spaces and in the case of bad daylighting design, where additional electric lighting may be needed to lift the space out of the gloom created by high sky luminances. You can read about the challenges involved in achieving good lighting design, making use of both electric and dare I say “natural” light, later in this issue. I can’t resist the temptation: since daylight is “natural” light, it must also be “organic” and much, much better and human-centric than that “artificial” light produced by “unnatural”, “inorganic” electric lamps. However, through the magic of spin, LEDs seem to be seen as less unnatural than, say, electric discharge lamps. The lighting world is an amazing place, with apologies to SBS. Warren Julian Editor The world is an amazing place ERRATUM Peter Boyce wrote saying “I have just received the February/March issue of Lighting. I was pleased to see Lighting in Flux in the contents (pp 48-53) but disappointed to see that Figures 1 and 2 had been transposed again, just as they were in the SLL Newsletter.” I have replied to Peter apologising for the error that occurred during the pre-press stage of production. It is amazing that two publications achieved the same error without any collusion. – Warren Julian CITYELEMENTS180ARINICITYELEMENTS230 Hess offers you an unparalleled selection. Increase the attractiveness of your urban spaces with our multifunctional lighting systems. Whether with ARINI, CITY ELEMENTS or RENO ELEMENTS. Perfection down to the last detail – just as you would expect from Hess. RENOELEMENTSCITYELEMENTS200 SMART LIGHT AND SMART MULTIFUNCTIONALITY – IN THREE DIFFERENT SMART DESIGNS!
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