[GB ended,discussion only] CRI > 80+ NICHIA 2000K-6500K [E21A/219B/219C/319A/144A/757GT-F1(Optisolis)]

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Texas_Ace
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kaybi wrote:
I suppose we can’t actually make reservations yet, though, can we?

Correct, reservations can not be made until the new Group buy thread is posted and then it is on a first come, first served basis.

A link to the new thread will be posted in this one I am sure.

clemence
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Texas_Ace wrote:
kaybi wrote:
I suppose we can’t actually make reservations yet, though, can we?

Correct, reservations can not be made until the new Group buy thread is posted and then it is on a first come, first served basis.

A link to the new thread will be posted in this one I am sure.

+1 Correct!

kaybi
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Welp, now we wait a few months for new stock on the 9080 219b, and some sm503 219c.

After seeing maukka’s results, the sm503 219c could almost be binned as 9080. And the results for the 219b 9080 are nothing short of spectacular.

Is there any data or cri tests for the 319a emitters?

sixty545
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maukka wrote:
With a reflector I measured significantly cooler color temps (about +700 kelvin) from the hotspot


I am pussled about that if you mean cooler than the spill. I would have expected the opposite?
Is’nt the hot spot supposed to be warmer as the reflector collects the (sideways) rays that have passed through most yellow phosphor?
maukka
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All the Nichias I have tested have a cooler hotspot than spill. Cree is opposite. What I meant that the difference was larger than with the 219 series. This might have something to do with the two stage reflector of the TM03 (which also hides any egg yolk effect djozz also mentioned). I tested a 144 series led with a normal reflector (from the X6) that produced the warm yellow center.

sixty545
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Thanks Maukka, interesting viewpoint.

BTW have you noticed that the sm403 turn rather green at high currents (specs), the opposite of the other smxxx and of Cree diodes.

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Here’s a 219C CRI90 sm403 on different currents in a Thrunite TC12. Doesn’t change much in tint.

djozz
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Looks like proof of pwm

maukka
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No PWM on the Thrunite.

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In that case: wow for the Nichia 219C then! Shocked Smile

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djozz wrote:

Did anyone yet put a high CRI 144A in a flashlight with smooth reflector yet? My single sample produces an ugly yellow spot in the center of the hotspot, but it has a slightly uneven phosfor layer, perhaps other’s leds are better?

I tried. I also have an ugly yellow spot in the center.
clemence
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144A yellow spot fix: any mild diffuser will do, OP reflector, colour mixing TIR, or any TIR specially designed for 144A (some Ledil)
The wider the beam angle of the optics/reflector the less the yellowing effect.
Unlike XHP50, sanding or roughing the lens dome has minimal effect. Only enlarge/smoothen the edge of the hotspot. I tried it
Slicing the dome will most probably works (plus more throw and slightly less output).

sixty545
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maukka wrote:
Here’s a 219C CRI90 sm403 on different currents in a Thrunite TC12. Doesn’t change much in tint.


I think it is much. To compare with it, take the D50 point.
If I use x,y= 0.3455,0.351 for this point it gives in my calculations CCT= 5002 K and an offset from the BB curve of 4.6 CIELuv. This offset can be clearly seen as greenish. (1 CIELuv is about the least color difference that can be seen as you know).
Your low to high distance I would guess is around 7-8 CIELuv. That amount I usually correct with a Lee filter “279 Eighth Minus Green” (not so usable here as tint changes).
I only brought this up because I made a S2+ with 219C CRI90 sm403 with PWM at 2.8A and it looked surprisingly green until I lowered the PWM current to 700mA. The specs also shows that tint shoots up in y value with current, somewhat compensated by temperature but only the high CRI model has this speciality.

clemence
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Also remember than even 3 steps grouping is still an ellipse, no a point

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In the data sheet, not all grouping ellipses follow the BBL symmetrically. The cooler temp slowly leaves the BBL as the temp raised. The 573 lower part ellipse barely touched the BBL. This risky balance is what makes up for better efficiency in 219C I guess.
For those who really don’t want even the slightest green sw45k 219B is the best bet, far away below the green zone. If you still want the the 219C, stick with the 3 steps and no higher than sm403.

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May be, you know, when 219C (9050 3-step) sw40 & sw45 will be available ?

Flashlights : custom (Jaxman E2L with led4power LD-4 drivers and 3xOsram CQAR.CC), custom Skillhunt H03 with Osram 3К/4К, Zebralight {H600fc IV, Sc600fc IV, H600fc III}, Jaxman E2(N219b), Convoy UV.
Previous: Zebralight {H501, H600W, H600W II, H602W}, NiteCore TIPCRI, A A01, Fenix L2D CE/CEQ5.

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The SM403 4000k looks absolutely beautiful out of this C8-Triple!

The only Green I see is when it’s OFF!

Big Smile Thumbs Up

KB1428 “Live Life WOT

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Evgeniy wrote:
May be, you know, when 219C (9050 3-step) sw40 & sw45 will be available ?

Official information:
- NVSL219B-V1 Ra 9080 sw40 late April
- NVSL219B-V1 Ra9080 sw45k uncertain availability
- NVSx219CT ALL series late April
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clemence wrote:
Official information:
- NVSL219B-V1 Ra 9080 sw40 late April
- NVSL219B-V1 Ra9080 sw45k uncertain availability
- NVSx219CT ALL series late April
Thanks for the update. The Ra9080s are worth the wait! Smile
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I think I better take shots of all the LED’s left from the last sale thread. Sadly I have no NVSL219B-V1 Ra9080 left to be included in the test. Later tonight, it’s still too bright here

malkoffdevices
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Thanks!.
Have a great day!.

clemence wrote:
I think I better take shots of all the LED’s left from the last sale thread. Sadly I have no NVSL219B-V1 Ra9080 left to be included in the test. Later tonight, it’s still too bright here

London !

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OK guys, I decided to build a comparison light bar using all the left over LEDs from all my sales. It's a good thing for future reference. The LED installed are various CCT and CRI of 144AME, 319ATE, and 219CT only. I don't have any 219B left to test. But due to the lack of input voltage required to drive all of them (~50V total), I can't post all the LEDs tint shot for now. I need to built my boost rig setup later. Shot in various current from 0,01A all the way up to 2A.

 

I only post 0,01A, 0,1A, 0,3A, 0,7A, 1,4A, and 2A tint shots. Maukka was right, no noticeable tint shift to the naked eyes. I even confirmed these shots to some of my friends, they're all agreed.

White Balance set at my standard 5600K. Shot with Olympus OMD EM5, Zuiko EZ lens 12mm-50mm. Exposure was speed adjusted to give relatively equal brightness, no change in aperture. RAW files processed using DxO optics software to normalize the geometry only. No other changes were made. Captioning and contact sheet were done using ACDSee photo editing program.

 

Hope this helps,

Clemence

 

sixty545
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Thanks for the effort , clemence! You’re right, it does’nt reviel much tint shifts nor the tint shift in maukkas measurements, post #584.
Edit:
What it shows on my screen, though, is a little green content in the sm403, but not much.
Thanks for your advice in post #586. Perhaps 219B sw45k is the way to go for me.

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tuelleric wrote:
Some advice needed, please. I want to mod a Surefire E1B with either one of the 219C sm503 or 219B sm453. Would you prefer the 219C with H17F and the possibility to direct drive it with 8A AW batteries? Or stay reasonable with the 219B with a linear 1.4A driver? Max output vs. max color rendition?

I am not yet sure what to do. Thanks for your input!

I was also considering using the h17f for a single emitter build. However, as I understand it, these nichia219Cs will burn out at the currents the driver allows. I have not tested this yet, but let me know if you do and it works out.

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Correct, the H17F is simply a PWM FET driver, unless you can have it setup to limit the max duty to around ~70% it will drive the LED with over 11A. Which is far too much.

If you limit the max duty it works ok, you will just loose around 10-15% output compared to a true constant current driver.

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I think up to 3A it is a linear driver. It uses 8× 7135 for that. Only for half turbo and turbo it uses a FET. See Dr. Jones’ description here:
http://drjones.nerdcamp.net/h17f.html

I think it should be fine when using a non performance cell or a current limited power supply while programming in order to protect the LED.

Texas_Ace
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tuelleric wrote:
I think up to 3A it is a linear driver. It uses 8× 7135 for that. Only for half turbo and turbo it uses a FET. See Dr. Jones’ description here:
http://drjones.nerdcamp.net/h17f.html

I think it should be fine when using a non performance cell or a current limited power supply while programming in order to protect the LED.

Correct, it will work in the 7135 mode but the turbo modes will drive it at around 11-12A unless the pwm is limited.

Even with a laptop pull I was getting around 8A IIRC which is way over what most laptop cells are rated for and not safe for that reason. With a GA it still gets over 10A.

The only way I have found to run it on an FET is by limiting the PWM. The TA driver works in the same way and that is what I do with it.

Although I hardly ever use turbo, 95% of the time the 7135 mode is enough.

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Is there a good cell to use for programming to prevent blowing anything up?

I had this with a single 219B. It melted my first switch. Turned the LED blue during programming but survived. I’d rather limit things though.

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As long as the LED is properly reflowed onto a DTP MCPCB and it has a good heat path they can handle a LOT of power. I have yet to kill a 219C. The output just drops massively and it gets really hot. For example it will put out basically the same luemens at 2.45A as in turbo @ 12A.

If you want to play it safe, use a cheap cell that is not fully charged, say around 3.6V.

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Good to know the 219c can handle the higher currents without killing it. I believe I read somewhere that the FET used on these drivers top out around 10A, but that could have been in a specific build with other factors. I’ll go see if I can dig up the source.

I think I’ll give this build a go and program with a weaker cell. It will only be on the FET for a short period of time while programming.

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