A big criticism leveled on LED lights is they don't match the color and quality of an incandescent light bulb. Start-up Intematix has developed a set of technologies that it believes improves LED lights. Using materials known as phosphors, scientists at the company are able to convert LED light from blue to more useful colors.
New tech improves the color of LED lights
Posting in Energy
A big criticism leveled on LED lights is they don't match the color and quality of an incandescent light bulb. Start-up Intematix has developed a set...
Apr 18, 2011
What I note of the comments made about changing the LED output is that people are missing that these are NOT filters but re-outputing by conversion of blue light to other frequencies and thus the process is much more efficient. After all a pure blue light cannot be filtered to say, orange any other way. This is a fine idea..the phosphor conversion approach and though I would prefer 5000K in my environment, others might want 3000K to match their need for a redder sort of incandescent look ( blech). To each his own on this but making such a light available at reasonable costs is the big thing today. It will save gigantic amounts of energy if they can bring the price to a comparable level to say, CFLs..
Changing the colour of LEDs to yellow to match old technology tungsten based light bulbs is certainly not "improving it",its only changing it. What if Edison had created a light bulb that simulated daylight,would we still want to change LEDs to yellow,I think not. For me,as a working photographer, Id far rather have a simulated daylight system than a tungsten or halogen system,in fact I have already got daylight low energy bulbs all around my house,a much better light to live under.
Por favor me mandan a mi correo, Ficha t??cnica ultima tecnolog??a led. Quiero usar estos led, para la iluminaci??n de plantas de acuario. Por favor comentar.
I would believe the color of natural daylight would be favorable to anything man-made I spend most of time enjoying the Florida sunshine and believe our eyes were designed to do the same. .
1. Yes photographers play with light and composition, but most of them do so in POST! It's absurd to be doing it in the actual shot. Waste of time and money. Therefore, you should be starting with the most accurate pic, not the one that's already color skewed. Yeah, a bunch of people are accustomed to Tungsten. A bunch of people are also accustomed to smoking cigarettes. We don't make them stop smoking, but the people that hate the sickly yellow skew appreciate not needing to deal with it. You want your bad habit, fine, but keep it to yourself. The problems typically aren't with LEDs themselves. The problem comes with people try to convert a low voltage DC technology to fit in existing sockets running high voltage AC. Why do we have this problem, same reason we have yellow lights. People "got used to" building houses one particularly stupid way, and so houses get built the same way now, with the same components for the most part for 100 years.
Well, these are interesting concepts and certainly address some of the issues concerning the light spectrum output of LED's. I'm surprised by the comments of the "photographer" because if he really understood photography and the way that the eye/mind perceives light is often at odds with reality. In fact manipulating light and color is frequently a photographer's ideal to create a desireable look or effect (let's not talk about proofing prints here). That being said, people are accustomed to the warmth of tungsten based lighting. Fluorescents often create a ghastly greenish glow, have issues with mercury, and rarely last their quoted life. For me, the biggest unasnswered question with LED's apart from their cost is whether they will last as long as the claims suggest? Will their electronics fail early and my $25+ bulb become nothing more than expensive landfill?
Nice idea, but how about discussing lumens before messing with Kelvin units. CFLs and incandescent bulbs give comparable info, so we know how much light we're buying. LED's seem only to come by the count of bulbs- and who knows how bright those bulbs are?
I am a commercial photographer so the color of lights is important to me. To the great unwashed: daylight IS bluer than incandescent lighting. So why in the world would the engineers want to take us backward? BTW, my office is illuminated with a Philips LED. And, yes, it does have a yellow filter in front of the LEDs. What the filter does is cut the actual output rendering it less efficient. I'm sure Al Gore is rolling around in his grave due to that one. (Oh...? He's alive? Sorry.) Terry Thomas... the photographer Atlanta, Georgia USA http://www.TerryThomasPhotos.com
I agree. "Just because" is not a good way to do things. In order to get really good lighting we need it to simulate sunlight as closely as possible. And yellow lighting is actually harder for me to see with at night. Ever wonder why a flashlight has great light at night? Because it ain't yellow.