[1900k edition is in!] WTS: 1900k-5800k 5mm LED 95+ CRI

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dk21291
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Looks nice, would definitely like an order of those!

djozz
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Nice smooth beam, but there will be people who dislike the slightly greenish edge. Is this a real thing or does it just show up in the pictures?

rngwn
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The greenish edge is quite real, but should be slightly less visible in real life.

What I see also differs from screen to screen. I noticed that the greenish edge is exaggerated when viewed on the phone instead of on the monitor.

snakebite
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seeing the cheap 5mm leds i see in the typical 9 led lights it seems you are correct.
joke is those are henry ford leds.
they can render any color as long as its blue!
it becomes clear just how bad they are when you take 2 harbor freight 9 leds and rplace the leds in 1 with high cri types.
i have a demo pair here to show that.
the ebay high cri make a much larger spot that covered up the stock one like its turned off.

Kame Sennin wrote:

I am new to the CRI things and my setup (Colormunki Photo + ArgyllCMS) might be poorly missused but from what i see on my cheap lights they range from a CCT 11000K / CRI 74 (R9 -20) for the better to something that Argyll can’t even understand telling me something like 999911K / CRI -1 for most of the others.


My guess is that the blue peak is so high compared to any other color that the calculation fails

1stein
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… and here comes another mod with this great LED

rngwn
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Shipping update:

id30209 – RR278675085TH (1× 5500k)
kame sennin – RR278675071TH (1× 5500k/1× 3400k)
Nismo – RR278675068TH (1× 3400k)
denkiman808 – LX104000012TH (1 × 5500k/ 1 × 3400k)
ludolf – RO247700195TH (1× 3400k)
LowLumens – RR252867131TH (2× 3400k)
AguassissiM – LX104000030TH (1× 5500k/ 1× 3400k)
DavidEF – LX104000043TH (1× 5500k/ 1× 3400k)
tomas_f – RO247700235TH (1× 5500k/ 1× 3400k)
Unheard – RO247700258TH (1× 5500k)

Samples also sent to Djozz in exchange for original Yujis.

slowtechstef
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Thanks rngwn, received the LEDs in the Netherlands.
Really happy with them Smile

staticx57
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djozz wrote:
Nice smooth beam, but there will be people who dislike the slightly greenish edge. Is this a real thing or does it just show up in the pictures?

It is just the cree edition 5mm
rngwn
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^ is that a good or bad thing?

rngwn
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slowtechstef wrote:
Thanks rngwn, received the LEDs in the Netherlands. Really happy with them :-)

 

I copied your mod a bit on my granny's headlight Wink

 

LowLumen
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I finally got around to ordering 100 of these unique little 3400K LEDs today!!! Looking forward to working with them on some projects.

Been out of the making and modding lights for a while… but with 2 (…and now looking at 3) PG&E power outages here lately I’ve renewed inspiration to make more custom battery powered indoor lamps and lights.

Lights that run for hours, soft lighting that is warm and comfortable. That’s what is needed when the power is out for many hours! These little warm high CRI wonders have inspired me.

rngwn
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Here's the beam comparisons between "5800k" version of these LEDs vs Original Yuji's 5600k LEDs (Thanks Djozz for sending these to me!). All pics are taken at 5500k white balance setting.

https://imgur.com/a/mhyavzn

 

Yuji's: Perpendicular

WTS: perpendicular

Yuji's: beam profile

WTS: beam profile

Unheard
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Tint comparison. Your LED wins for its better beam profile, tint is really close.

Smile, you cannot kill them all.

id30209
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Are there any 3mm options in HI CRI?

WTB Titanium 4sevens 2xAA tube

rngwn
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They don’t make 3mm version regularly. That means I will have to make 10k pcs minimum and I don’t get to choose the tint.

So, that’s a “no” for now.

djozz
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I got a sample of 10 of his high CRI 5600K leds from rngwn in this week and I did some testing.

First a beamshot from 20cm distance from the wall:

Actually this shot looks nicer as in reality, the beam is indeed really smooth but there is a slight tint change at the very edge but it is nothing serious, at least not so bad as rngwn’s own beamshot in this thread.

The tint, I measured at 5mA and at 50mA.

5mA: CCT=5610K, duv=+0.0033, CRI=98.0, R9=91.4, R12=80
50mA: CCT=5666K, duv=+0.0010, CRI=98.2, R9=92.8, R12=87

Here are some graphs at 50mA:

So the tint is really really good and does not change much at different currents.

The light output. I made no graph (not enough time) but a video. You see the led shining at a luxmeter that I placed at a precise distance so that the luxmeter reading is quite exact 10 times the output in lumen. So a reading of 93 corresponds to 9.3 lumen total output. The voltage and current can be read from the USB power supply. I checked, they are not greatly off from reality.

So, like the 3400K led, it maxes out at about 120mA (25 lumen), but above 80mA (22 lumen) there is not very much gain. This is a very nice performance, at a bit but not much better than the Yuji 5600K led.

Conclusion: great led again! Well done.

djozz
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As discussed via PM also, I expect a good market for high CRI 3mm leds, especially at warmer tints. Of course over here we like them anyway because we like all leds, but in model building (trains!), perhaps a bigger hobby than flashlights worldwide, a lot of use is made of 0603 and 1205 leds, sold on ebay with two wires already attached because soldering them is too difficult for most, while the application of standard 3mm leds is more robust, way easier and often looking better. I have one time bought warm 3mm leds (was not easy to find) and the tint is quite disgustingly yellow-green, I would not like to light my preciously built railroad yard with those.

But I’m not a model builder and do not know one so perhaps someone else can confirm?

id30209
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Well i need them for my flashlight mods, not enough space for 5mm. I'd be happy if i can find good warm (hi cri) like 3mm leds

WTB Titanium 4sevens 2xAA tube

led4power
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These LEDs look nice for sure, but what about super short life time of 5mm LEDs (caused mainly by yellowing/burning plastic LED lens which is not resistant to heat like silicone)?

Most 5mm LEDs are rated ~20mA max. because of bad cooling and plastic lens burning problem. Many will drive these at much higher current,  what is expected lifetime in those cases?

 

djozz
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Thanks for that info led4power, I did not know that. The graph is very convincing, and overdriving 5mm leds makes it much worse. Not that lifetime matters greatly for what we hobbyists do here, my Nitecore Tube is used for 3 seconds once a day to look into the letterbox, but if we do serious builds for Nasa Wink it does matter a lot.

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I don’t have data for this particular LEDs, but a very old “fade test” data from CPF do suggest that a really well-made 5mm LEDs (radioshack’s) might happily last 50k hrs at 30ma.

For Nichia-tier LEDs, they would last ~5000 hrs at 30 ma (at L70 a.k.a. leds considered “failed” when the brightness drops below 70%)

https://www.candlepowerforums.com/vb/showthread.php?264326-5mm-LED-fade-testing-continued

The thread also mentioned that, LED lifespan increases 4x for every halved currents.

For these LEDs though (which is now known to be more efficient than Yuji’s and probably many standard 5mm LEDs), my educated guess would be at least ~4000 hrs at 30ma/ ~1000 hrs at 60ma L70. For occasional usage (i.e. 1 hours/day) that will take years until the degradation becomes apparent.

AguassissiM
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@rngwn

Got my package. Big Smile Wow that was fast. Thumbs Up
Thank you very much. Beer
Will have to find some time to play with them….

***Rofis MR70*TurnRaise*Catapult V6*BLF Q8*BLF Mini*BLF Micro*Haikelite MT09R* Convoy C8*BLF D80v2 SST40*MatemincoX6S*AstroluxFT03-xhp50.2*AstroluxFT03-sst40*BLF-LT1*AstroluxFT03S-SBT90.2***

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Got a notice from the post office in my mailbox yesterday

I have no idea why that time they droped a notice in the mailbox instead of the parcel like for the previous leds but i was lucky enough to be able to go there today (as i am usually working during opening hours) and take the parcel.
It looks like it was opened (customs ?) but everything is fine and i am happy with the leds Smile


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Last shipping update on mine, according to USPS is that it departed “SUVARNABHUMI MAIL CENTRE (SMC), THAILAND” on November 1st. No idea where it went from there.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

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@David – There are two possibilities:

- The shipment is on the queue to be loaded on the airplane at SMC (which will then head to the States).
- The shipment has already landed at LA or JFK (or Honolulu if shipped to Hawaii), but is still being unloaded from the warehouse to be scanned.

Once it’s scanned by USPS it will appear as “Processed through facility” at either LA or ISC NY before heading to the customs.

Whatever case it will be, once it shows processed at SMC, it will usually take 3-10 days to appear in the USPS’s tracking as arrived in U.S (in the case of Airmail/ePacket during non-seasonal period).

Barry0892
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djozz wrote:
I got a sample of 10 of his high CRI 5600K leds from rngwn in this week and I did some testing.

First a beamshot from 20cm distance from the wall:

Actually this shot looks nicer as in reality, the beam is indeed really smooth but there is a slight tint change at the very edge but it is nothing serious, at least not so bad as rngwn’s own beamshot in this thread.

The tint, I measured at 5mA and at 50mA.

5mA: CCT=5610K, duv=+0.0033, CRI=98.0, R9=91.4, R12=80
50mA: CCT=5666K, duv=+0.0010, CRI=98.2, R9=92.8, R12=87

Here are some graphs at 50mA:

So the tint is really really good and does not change much at different currents.

The light output. I made no graph (not enough time) but a video. You see the led shining at a luxmeter that I placed at a precise distance so that the luxmeter reading is quite exact 10 times the output in lumen. So a reading of 93 corresponds to 9.3 lumen total output. The voltage and current can be read from the USB power supply. I checked, they are not greatly off from reality.

So, like the 3400K led, it maxes out at about 120mA (25 lumen), but above 80mA (22 lumen) there is not very much gain. This is a very nice performance, at a bit but not much better than the Yuji 5600K led.

Conclusion: great led again! Well done.

WOW, C01 light has hope again?

WhatsApp: +8615773183209 

My new Facebook account: https://www.facebook.com/barry.dong.9250

DavidEF
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Barry0892 wrote:

WOW, C01 light has hope again?

Yes! Please! Crown Thumbs Up

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

Unheard
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Barry0892 wrote:
WOW, C01 light has hope again?

Yeah!!!

Red 3400K, Blue 5800K. I missed the cw blue C01 and got a red one instead. Plus there are never enough warm white flashlights in a houshold.


(WB: 5000K)

See what those LEDs made me doing out of frustration about not getting C01’s?

(sorry for picture spaming from my side Blushing )

Edit: And don’t forget Jos’ request for hosts Big Smile

Smile, you cannot kill them all.

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Is it possible to get these in 2200-2700K too? I have a lot of LED candles that I want to change out the LEDs on. Could possibly do a group buy if others are interested.

Current lights:

Emisar D4V2 SST-20 4000K, D4V2 Ti SST-20 2700K, D4V2 Ti SST-20 4000K, D4V2 Ti XPL-Hi V3 1A, D4SV2 SST-20 3000K Noctigon KR1 OSRAM W2, K9.3 XPL-Hi V3 3A + SST-20 2700K | Fireflies PL47G2 XPL HI V3 3A, PL47G2 SST-20 4000K, E07 219B 4500K Lumintop FW1A SST-20 4000K, Tool AA 2.0 Nitecore LR12 XP-L HD V6 6500K, TUP XP-L HD V6 6500K | Sofirn C01S SST-20 4000K, SP10S LH351D 5000K, IF25/LT1-M SST-20 2700K + 6500K w/3D printed diffuser, BLF SP36 LH351D 5000K, BLF LT1 | ZebraLight SC700d XHP 70.2 5000K Hi-CRI, SC53Fc XP-L2 4000K Convoy C8+ SST-40 6500K Acebeam H30 XHP 70.2 5000K | Manker E14 III LH351D 6500K

DavidEF
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Mine arrived today! Thanks again rngwn! I’m hoping to put some of them to use soon!

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

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