High CRI LED

[NickBose]

Can someone pls tell me exactly where to buy high CRI LEDs and affordable flashlights with high CRI LED (not custom - made)? I'm in Australia. :thinking:

 

[Tekno_Cowboy]

If you're in Australia, there's a company in Perth called Mondo Electronics that sells High-CRI SSC P4 LED's PN S42180-T1SS.

I don't know of any place that sells non-custom or modded lights with High-CRI emitters.

 

[Th232]

Define affordable?

 

[NickBose]

Around US$50-80 shipped :crackup:

 

[Tekno_Cowboy]

I can mod several lights to a High-CRI LED, but it will cost you almost that $50 in addition to the cost of the light. If you're interested in more details, there's a link in my sigline.

 

[NickBose]

That's why I asked about production lights.
About the spare, I actually need high CRI 5mm LED. Where can I get one or two?

 

[Th232]

Hmm... never heard of any high CRI 5 mm LEDs, only ones I've ever seen are power LEDs.

Will be interested if someone knows of a source though.

 

[NickBose]

Do warm and neutral LEDs yield significantly better colour rendering index (than white LEDs) ?

 

[Tekno_Cowboy]

I think Nichia makes a 5mm LED with better CRI, but I could be mistaken.

Some warm/neutral emitters do offer better CRI, but some don't. You pretty much have to check the rating for every emitter to know for sure.

 

[neoseikan]

I think Nichia makes a 5mm LED with better CRI, but I could be mistaken.

Some warm/neutral emitters do offer better CRI, but some don't. You pretty much have to check the rating for every emitter to know for sure.

Nichia 5mm LEDs don't have CRI infos in their catalog. They have High CRI highpower ones.

 

[AnAppleSnail]

Do warm and neutral LEDs yield significantly better colour rendering index (than white LEDs) ?

Comparing CRI across different CCTs is a mistake. To make an informed decision, you'll need to know the CRI and the CCT - but the CRI is falsely named. It tells you how close a source is to the output of a blackbody emitter. If a hypothetical source shows colors better or worse than a blackbody emitter, it is penalized for those spectral differences.

 

[red02]

Comparing CRI across different CCTs is a mistake. To make an informed decision, you'll need to know the CRI and the CCT - but the CRI is falsely named. It tells you how close a source is to the output of a blackbody emitter. If a hypothetical source shows colors better or worse than a blackbody emitter, it is penalized for those spectral differences.

The ideal source being a tungsten fillament and not the sun, right?

Does that mean that the CRI rating can be given without actual empirical research? Just looking at the readout from a spectrometer?

 

[HDS_Systems]

NickBose,

HDS Systems makes production high CRI LED flashlights. 100 lumens calibrated, 4 preset output level, fully customizable, and rather rugged.

AnAppleSnail,

Rendering colors "better" or "worse" than a black body radiator can only be described as application specific. All specifications have their limitations and CRI is no exception.

Red02,

The "ideal" source is probably only close to sunlight because we evolved with the sun as our primary light source. Incandescent lights are a common reference only because that is what technology was able to produce inexpensively for the last many decades.

There is a specific formula for calculating the CRI value. Many spectrometers have a CRI calculator built in.

Henry.

 

[JCD]

The ideal source being a tungsten fillament and not the sun, right?

"The CRI is calculated by comparing the color rendering of the test source to that of a 'perfect' source which is a black body radiator for sources with correlated color temperatures under 5000 K, and a phase of daylight otherwise (e.g. D65)." Source

Incandescent lights score 100 because they utilize a black body radiator to produce their light, and their color temperatures tend to be below 5000 K (i.e., they produce neutral and/or warm white).

For color temperatures above 5000 K, i.e., cool white, sunlight is the standard of comparison for obtaining the CRI value.

 

[NickBose]

NickBose,

HDS Systems makes production high CRI LED flashlights. 100 lumens calibrated, 4 preset output level, fully customizable, and rather rugged.

I am aware of the high CRI RA EDC. I know its quality justifies the price but I am, however, looking for a cheaper, mass production type of light with a high CRI LED. There may be no such light though.

About the 5mm LED: I want to get a high CRI to put into this thing

 

[McGizmo]

I queried my friend at Nichia about the possibility of them using their dual phosphor on a small lamp style LED and he told me it was not planned or likely to happen. I think your best bet provided it would work in your application would be to get a hold of one of the small Nichia 1/2 watt High CRI 036 LED's. I used some in a short custom run of Sapphire's and the performance of these LED's was quite impressive. At the current level you are probably driving the 5mm LED at, I would imagine the 036 would be fine with just legs soldered to it and no additional heat sink. The LED has no secondary or integral optics so its beam distribution will be flood which may be an issue for you as well.