I found this nicely composed chart for the visible spectrum, with an emphasis on the varying effects of blue light. I can’t find the original source but within the image it is credited to “High Performance Optics”. Continue reading visible spectrum image
Check out this excellent blog post and test scenario by Kevin Willmorth, owner of Wisconsin-based Lumenique. I agree with most of his conclusions in his post, but with two comments: First, I hope to see other optics laboratories replicate the … Continue reading why CCT tuning in the work environment is not enough
Check out this amazing article exploring the current state of knowledge on the science of circadian lighting: “The Age of Enlightenment: The Promise of Circadian Lighting“, by Lynne Peeples on the website Undark.org. Really…this is one of the best examples … Continue reading age of enlightenment: the promise of circadian lighting
As a lighting nerd for close to 20 years, I’m personally disgusted at the lighting industry’s numerous dubious claims for the health benefits of blue light. I’m equally disgusted at the sensationalist claims about blue light’s possible negative health effects … Continue reading blue light decreases suicides on train platforms
Check out this beautiful 1 minute video from National Geographic explaining visible light. I especially love the depiction of light waves in the electromagnetic spectrum and the absorption and reflection of light off of colored surfaces (screen caps below). Continue reading national geographic – visible light video
Rogier van der Heide is curating a new conference called Trends in Lighting in partnership with Luger Research. The conference will be held in conjunction with Luger’s Led Professional Symposium in Bregenz, Austria. Rogier has been quite outspoken about pushing the conception … Continue reading trends in lighting conference
My sons (age 7 & 9) did a wonderful little lighting project in their elementary school classes today: Little diorama boxes (large size shoe boxes) where the teacher gave them some small battery-operated strings of LEDs or other small flashlights … Continue reading view boxes
This is shaping up to be the ULTIMATE LIGHTING NERD’S movie! Can’t wait to see it! Continue reading the current war
Thank you to all those who attended my conference session as part of the THINKLIGHT forum at the Guangzhou International Lighting Exhibition. Here is a Dropbox download link to my full slide presentation (a large PPT file which includes video), … Continue reading guangzhou international lighting exhibition: embedded lighting slides
Not too often do people put their performance evaluations into the public domain. However, I’m so impressed with the attendee evaluations I received for my Lightfair 2017 conference session “Ambient Luminescence and Experiential Design” that I will post them for … Continue reading lightfair 2017: my conference session report card
In two weeks I will be presenting “Embedded Lighting” as part of the THINKLIGHT conference track at the Guangzhou International Lighting Exhibition. I’m looking forward to exploring this major global lighting show, organized by the same Messe Frankfurt organization that … Continue reading guangzhou international lighting exhibition
Last week, at the end of my Lightfair conference presentation titled “Ambient Luminescence and Experiential Design“, a crowd of people came up to me at the end of the conference to ask me questions, connect, etc. Patiently waiting until the … Continue reading addison kelly
Thanks to all who attended my conference presentation titled “Ambient Luminescence and Experiential Design“. As promised, here is the presentation in PDF format: BradKoerner_2017_Lightfair_Philadelphia_FINAL DRAFT Here is the PDF of the handout material (a collection of articles I wrote originally on … Continue reading lightfair 2017 presentation: ambient luminescence and experiential design
Open to anyone 35 years or younger in North America, the Richard Kelly Grant seeks “…to recognize and encourage creative thought and activity in the use of light. Cash award(s) will be granted to the person(s) who preserve and carry … Continue reading IES richard kelly grant – call for entries
When exactly does a romantic “sparkle” become a bothersome “glare”? I’ve been considering this question now for some time, particularly in relation to Richard Kelly’s six qualities of light. To me, the primary factor that tips the balance between a … Continue reading a new concept for “glare”
Thanks to my 8-year old son, a lighting riddle for you to solve: A windowless room contains three identical light fixtures, each containing an identical light bulb or light globe. Each light is connected to one of three switches outside of the room. Each bulb is switched off at present. You are outside the room, and the door is closed. You have one, and only one, opportunity to flip any of the external switches. After this, you can go into the room and look at the lights, but you may not touch the switches again. How can you tell which … Continue reading a lighting riddle
According to Lux Magazine: Neuroscientist professor Russell Foster…led the team at Oxford University which discovered the eye’s third photosensitive cells, creating a whole new paradigm in interior lighting. Previously unknown to science, the cells hold the key to our understanding … Continue reading russell foster
I found a fantastic PPT that looks like an academic lecture covering the pioneering mid-century lighting designer Richard Kelly. The slide deck contains an especially impressive range of photos of Kelly’s projects that are not commonly available on the web. The … Continue reading richard kelly – powerpoint deck with rare images
For us lighting nerds, a terrific webinar hosted by the US DOE discussing the state of the actual scientific research on street lighting and sky-glow sources, versus the extreme scare-mongering of recent “scientific” publications: Bruce Kinzey of Pacific Northwest National Laboratory … Continue reading US DOE street lighting “get the facts” webinar
I’ve advocated in many forums that embedded lighting, particularly fusing patterns of light into architectural wall and ceiling surfaces, will become a major trend going forward, especially in office applications. My theory is that in natural settings we humans are instinctively … Continue reading using embedded lighting in office environments
