Here’s an interesting article about color perception, specifically blue/green perception, from The Guardian. There’s also a link to a fun web site where you can test your blue/green perception.
Source: Do you see blue or green? This viral test plays with color perception | Well actually | The Guardian
On Wednesday, September 25th I’ll be on a panel at the Retail Design Institute New York Chapter’s Lighting Summit 2024. The other panelists are Shoshanna Segal of Hantranft Lighting Design, Carlotta Dove of IA Interior Architects, and Kazumi Tanimura of Atelier Lumiere. The event is at the Illuminations showroom at 5 Penn Plaza. Hope to see you there!
I’ll be giving a presentation on TM-30 (naturally) at the American Lighting Association Conference in Palm Beach, FL on September 23rd. If you’re at the conference and/or a fan of TM-30 stop by and say hi.
We’re now up to 14 states and Canada that have enacted one or more restrictions or bans on mercury containing lamps. Some of the bans are already active, while others go into effect as early as January 1, 2025. LEDVANCE is maintaining a list on their website along with other helpful resources.
The big fluorescent news last week was that Minnesota has become the ninth state to pass a phase out of fluorescent lamps (the others are California, Colorado, Hawaii, Maine, Oregon, Rhode Island, Vermont, and Washington). Minnesota’s timeline is aggressive – screw-based compact fluorescent lamps will be banned from sale six months from now, starting on January 1, 2025. Other fluorescent and mercury vapor lamps will be banned from sale beginning January 1, 2026.
The Minnesota House of Representatives has an information sheet about the new law here. What’s interesting is that the first topic is about reducing the hazard of exposure to mercury, not increasing energy efficiency. It’s not wrong, just curious. The information sheet then goes on to address reduced CO2 emissions, electricity savings, and reduced power plant mercury emissions.
Illinois also has fluorescent banning legislation working through the legislature, so by the end of the year we may see 10, 11 or more states that are phasing out fluorescents.
It’s been a while since I’ve posted anything because I’ve been working on a new book. More on that as we get closer to the publication date. Meanwhile, I’ve been asked (somewhat at the last minute) to speak on Monday June 3rd at an upcoming AIA New York event called Healing Light: The Biological and Social Effects of Lighting. The presentation will be an introduction to color temperature and color rendering and is primarily targeted at architects and interior designers who are new to lighting. Registration is free to AIA members and students, and only $10 for the general public.
The Minamata Convention on Mercury, a program of the United Nations with delegates from at least 150 countries, is dedicated to improving global health by phasing out the use of mercury in manufacturing, banning new mercury mines, and limiting mercury emissions. Last month, 147 countries (out of a global total of 195) agreed to phase out florescent lighting globally and completely by 2027.
According to the appliance efficiency non-profit, CLASP, the phase out will, between 2027 and 2050:
Early fluorescent lamps were being tested by Thomas Edison and Nicola Tesla in the 1890s, but it took several advances before they were ready for commercial use around the 1940s. According to the Department of Energy, by 1951 more light was being produced in the US by fluorescent lamps than by incandescent lamps. But, this always came at a cost. Fluorescent lamps work by passing an electric current through gaseous mercury, which emits ultraviolet light, which in turn is converted to visible light by the phosphors that line the fluorescent tube. When discarded (and eventually broken) the mercury would enter the environment, which is why the EPA began encouraging fluorescent lamp recycling and mercury recovery in the mid-2000s. Mercury is a neurotoxin, and symptoms of prolonged and/or acute exposures include:
So, after around 70 years as the dominant commercial light source, and 10 years of decline after the introduction of LEDs, the fluorescent lamp has joined kerosene, whale oil, and others as an historical or legacy light source.
Tom Butters, the Founder and Executive Director of The Lighting Agora (full disclosure: I’m a member) was recently interviewed by LightNOW. You can read it here: Interview: Tom Butters On The Lighting Agora | LightNOW
I’ll be giving two presentations in the next month.
On September 8th I’ll be giving an online presentation to the Raleigh Section of the IES. Simplifying, Understanding, and Applying IES TM-30 will be from 12:30 to 1:30 eastern. I’m going to set aside the color science that normally opens a TM-30 presentation to make more time for Annex E and the PVF specification system. Admission is free. Register here: https://www.eventbrite.com/e/simplifying-understanding-and-applying-ies-tm-30-tickets-695339287527?aff=oddtdtcreator
On September 19th and 20th Tony Esposito and I will be presenting Designing with TM-30, our third TM-30 presentation at ArchLIGHT Summit in Dallas, TX. This 90 minute presentation starts with Tony talking about color science as it applies to TM-30, then I discuss integrating TM-30 into the lighting design workflow, and we wrap up with a 30 minute demonstration of TM-30s capabilities with the best mockup I’ve ever seen (see below for Tony’s photos of last year’s mockup). Register here: https://archlightsummit2023.sched.com/
I have written a lot about TM-30 from the specifier’s viewpoint – how TM-30 is better than CRI, explanations of the various TM-30 measures. why TM-30 data and reports are so important, how to get TM-30 data or reports, how to use TM-30, etc.
This month’s LD+A has a great article about TM-30 from the manufacturer’s viewpoint that addresses issues such as – why TM-30 reports for every LED option aren’t always available, why some manufacturers are reluctant to prepare TM-30 reports, strategies specifiers can use to deal with these issues, and more. It’s a very useful article. Give it a read at TM-30 Update: Challenges and strategies for working with SSL manufacturers – Illuminating Engineering Society %