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Correction Technique Adds 'Warmth' to Dimmable LED Light
1/15/2013

Using a correction technique, NXP engineers say they can produce a dimmable LED color that lies between amber and white.   (Source: NXP Semiconductors)
Using a correction technique, NXP engineers say they can produce a dimmable LED color that lies between amber and white.
(Source: NXP Semiconductors)

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tekochip
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Re: Great innovation
tekochip   8/28/2013 3:32:39 PM
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That's a really clever technique.  I worked with a pinball company (OK, there's really only ONE pinball company), and their solution was to mix additional colors in with the white LEDs to make them look a little less ghostly.  Reflectors were also used to warm the white LEDs up a little bit.  As you can imagine there are quite a few bulbs in a pinball machine and finding a solution was really important.
 
White LEDs did make great replacement for flashers, which was really a 12V bulb hit with 24V, as you can imagine, they wear out pretty fast.


Ann R. Thryft
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Re: Great innovation
Ann R. Thryft   8/28/2013 12:20:28 PM
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I don't remember the details, but I have seen ads about better, more naturally-colored LED-based light bulbs recently, so there's hope.

Charles Murray
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Re: Great innovation
Charles Murray   8/27/2013 6:12:33 PM
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I agree, Ann. Are those LEDs bright? Yes. Pleasant? No.

Jack Rupert, PE
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Re: Great innovation
Jack Rupert, PE   2/25/2013 3:45:11 PM
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I intend to do something similar, Charles.  At the moment, I'm in a temporary location, but when if the lighting is similar when I get a permanent home, I expect to be getting myself a desklamp that will throw some warmer light on my work area.  My previous company actually supplied halogen desklamps for that purpose and one of the part-time student admins who works for me already brought in an incandescent light for this purpose.

Gorski
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Warm LED Light
Gorski   2/9/2013 3:44:01 PM
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I think this is a step in the right direction. Dimmable LED lights that are "warm" would be a great product for the home, much less cars. I have many dimmable lights in my home. Alas, all are incandescent. The dimmable LEDs available have a very narrow "dimming range."

 

GORSKI PE

Ann R. Thryft
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Re: Great innovation
Ann R. Thryft   2/6/2013 2:52:20 PM
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Those white LED bulbs can cause eyestrain over long periods--they're just too harsh, although ideal for short periods of intense scrutiny when looking at fine detail.

Charles Murray
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Re: Great innovation
Charles Murray   2/4/2013 7:31:46 PM
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Yes, choice is good, Ann. I have a cold white LED bulb in my office. About a year ago, I unscrewed it and replaced it with an incandescent.

Ann R. Thryft
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Re: Great innovation
Ann R. Thryft   1/28/2013 12:12:21 PM
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It's not just the old-fashioned fluorescent bulbs that have that awful greenish glow but also the CFLs--those were the ones I was referring to. I agree with William K--there should be variety and choice, not only for different people, but for different uses. The cold white light of LEDs is great for seeing fine details.

William K.
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Re: "warmth" added to led lights.
William K.   1/26/2013 8:43:41 PM
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Jack, it seems that you are correct. I forgot about our legislative body's decisions that were made based on all of those emotions. They seldom let reason and intellect interfere with their process, and so now we are stuch with that pale orange glow lighting.

Forgive me, I was thinking rationally. I hope that the lighting police are not on their way just yet.

Jack Rupert, PE
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Re: "warmth" added to led lights.
Jack Rupert, PE   1/26/2013 5:30:25 PM
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Unfortunately, William K. you are only partially correct.  This wouldn't even be such an important discussion if we were allowed to choose the lighting type we wanted based on color, preference, costing, efficiency or whatever is most important to the individual.  However, the free market was stepped on with others telling us what those priorities should be...and which "better mousetrap" we HAVE to buy.

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