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CRI and GAI: A New Way to Look at Color Rendering
In a demonstration performed at Rensselaer’s Lighting Research Center, observers were asked to view a still life of fresh fruit illuminated by different undisclosed light sources. They were then asked to comment on the appearance of the fruit and on their preferences. Three out of the four sources were considered acceptable, the favorite being... »
Basic Sustainable Lighting Concepts: On Electric Lighting
Part 3 of an ongoing series outlining design principles for sustainable lighting design: here are a few ideas regarding electric lighting to help navigate the greenwash. Strike a balance between efficiency and functionality The efficiency of a light fixture or system is not a replacement for functionality and aesthetics. On the other hand, the... »
Dispatches from Lightfair
Every year, many of us here at Lam attend Lightfair® International, an annual lighting trade show and conference, allowing us to keep up to date with products from hundreds of lighting manufacturers, as well as design tools and technologies, standards and practices, and industry-wide trends and innovations. The following are some of our impressions... »
The Tortoise and the Hare: Linear Fluorescent Lamps and LEDs
The dazzle of new LED technology is grabbing most of the headlines in today’s energy efficiency stories, but, in reality, good ol’ linear fluorescent lighting systems are delivering consistent light output with terrific energy savings at very competitive prices on most of today’s LEED projects. While LED technology has been the darling of fixture... »
The Color of Light
Despite some of their current shortcomings, we are all enamored with the hope and promise of LEDs. When we begin a design session with a client these days, it’s a matter of minutes until someone asks “can we use LEDs for that?!” We respond with the usual overview that there are some very good... »
Specification Grade Sustainability
Recently a lighting company came into our office to show us their new LED fixture. I prepared myself for the usual spiel: tight quality binning, a high-performance heat sink, ELV dimming option. However, this particular fixture had been designed in a way that we haven’t seen from many other companies: the entire fixture, an... »
Healthy Exterior Night Lighting – Is There Such a Thing?
Many people would argue that the healthiest lighting at night is no lighting at all. Studies are revealing that biological rhythms are offset, sleep patterns are disrupted, even breast and prostate cancers are more likely with disrupted circadian rhythms, due in part to improper lighting at improper times of the day. The human race... »
The Next Big Step
Lighting design hasn’t changed much since someone first decided to call himself a lighting designer. Twenty years ago, the most earth-shattering developments were in fluorescent lamps; ten years ago saw advances in ceramic metal halide; today we’re cautiously welcoming LEDs into regular practice. LEDs really do have the potential to displace a lot of... »
Drinking the LED Kool-Aid
I love LEDs. Really, I do! They offer so many possibilities for new ways to light our world with less negative environmental impact. And besides, they’re cool! What I can’t stomach is the continuing hype. Frustration with LED hype is old news for lighting designers and for readers of this blog, but I thought... »
“Less Or Else” is Becoming a Bore
Architectural lighting is poised for a dramatic transition into innovative new applications and approaches to sustainability. To summarize this transition, let’s look at architectural history through the lens of Mies van der Rohe’s famous quip “less is more”: More is more: classical architecture in an age with limited technical and material capability. Less is... »
