I have several fresh and brewing ideas about office lighting, putting new technology to work to make sitting in our little prisons more enjoyable and healthful. To put these ideas in context, and to consider real-world application nuance and detail, I’m collecting images of actual office spaces from anyone will to share. I don’t need great pictures, just a quick snap with a phone that shows as much of the space as possible, perhaps with the lighting visible.
My office also houses the 3D printers. They need the clean/warm space to work best, and I like having them close.
If you have a moment, include any comment you might have about what you hate about the space, and the lighting, and perhaps what you like most? The spaces don’t have to be all cleaned up and tidy, in fact, the mess tells me as much as the arrangement.
I promise the images will go no further than a folder on my hard drive for reference in creating illustrations of model spaces within which I will be laying out alternative approaches and lighting products that might be applied.
You can do this all in less than a minute with a smart phone by sending me a an image to 414-241-5124, or kwillmorth@lumeniuque.com. I’ll send you a look in the future to what came from the effort, giving anyone who participates an inside peak of what I came up with and why.
Thanks in advance to all that participate!
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Why CCT Tuning in the Work Environment is not Enough
Posted: November 27, 2018 in Energy, Facilities, General SSL Commentary, UncategorizedTags: LED Lighting
There is a great deal of marketing noise professing the use of CCT white light tuning to enhance circadian function in work environments. The real question is whether this approach actually has any real-world effect on human response to light in the spaces it is being applied to.
Theoretically, the proposition is that by changing the CCT of light, one can affect circadian reaction – specifically increase or decrease melatonin suppression. The proponents of CCT tuning profess that, with no consideration of illuminance levels, cooler CCT’s will produce greater melatonin suppression, resulting in a more wakeful state, while warmer CCT’s will produce significantly less melatonin suppression, creating a more restful state that does not disrupt sleep cycles. The assumption is that illuminance levels required for proper task performance can be maintained, relying solely on a CCT change alone to impart the desired “Human Centric” benefit.
To test this, I created a test box that houses 5 different high CRI LEDs, with a dimmer. The CCT’s I chose are the popular 2700, 3000, 3500, 4000, and 5000K. All had >88CRI and >90Rf/94Rg (using TM30). The first test was to set illuminance at 50Fc, and measure the difference in Circadian Stimulus (RPI/LRC method), and Melanopic Lux (Well Buildings Standard). (more…)
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