A Lesson in Color Rendering Index August 25, 2009
Posted by Speaking Sustainability in The Basics.Tags: Color rendering index, CRI, LED, led lights, solid state lights, SSL lighting
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I explained color temperature a while ago. Now, I’m seeing more and more LED products promote their high CRI, or color rendering index. So, let me explain…
Are LED lights efficient over their entire lifecycle? August 11, 2009
Posted by Speaking Sustainability in News, The Basics, The Business.1 comment so far
A controversy bubbled up in the NY Times yesterday – does it take so much energy to manufacture LEDs that it offsets the energy saved by using them? A new study answers this question that has already been answered by the DOE…. (more…)
A Lesson in Color Temperature December 7, 2007
Posted by Speaking Sustainability in The Basics.Tags: Color temperature, Kelvin
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Color temperature has a specific scientific meaning. If you use the term “warm glow of light” to describe a typical incandescent bulb, a color scientist will correct your naive description. Similarly, the description “warm white” for a particular type of LED that mimics incandescent light closely is a misnomer.
How LEDs Work — A Layman’s Explanation November 29, 2007
Posted by Speaking Sustainability in The Basics.Tags: how leds work, LED, led lights, solid state lights
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I have a deep curiosity about science, took my share of chem and physics in high school. But that’s about it. When you delve deep into LED’s you quickly get beyond my meager knowledge. So here’s my translation (with apologies to any scientists who shake their heads at my oversimplification!). (more…)
Welcome to the revolution November 11, 2007
Posted by Speaking Sustainability in The Basics.Tags: consumer reviews, LED, led lights, solid state lights
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You can just about forget compact fluorescent bulbs. In a few years they will be as obsolete as incandescents already are.
I’ve become fascinated by this new technology and excited to see so many products already using them. While there are still significant research, development and engineering that must be done to make them everyday products, they are a lot closer than many other alternative energy products. The nightlights, flashlights, Christmas lights, booklights, etc. already on the market will drive volume to lower costs and revenue to fund the additional research.
I’m not a professional in the LED industry, or anything related. I’m just an energy efficiency nut and looking to help drive a major change in how we consume energy.
So stay tuned and I will be trying out a lot of products and will let you know what I, an ordinary consumer, think of them.
The LED Beginning Inventory November 11, 2007
Posted by Speaking Sustainability in The Basics.Tags: consumer reviews, LED, led lights, solid state lights
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A few months ago when I first started hearing about LED lights, I was fascinated. I read that they are in mobile phones and other gadgets as the light source for the displays. And I thought that was cool. Then I started to look around my house and saw them already here:
