Does anyone have an experience with buying from Beijing Yuji's High CRI led webstore?

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Evgeniy
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hank wrote:
But "no blue_ is what I'm mostly looking for that's hard to find.

May be,  Yuji 1900K led's ?

 

 

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.

hank
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That spectrum does look good: http://www.yujiintl.com/packages/high-cri-led-test-reports-candle-white-...
“candle white” would be an apt description of that light.

djozz
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The 1900K leds are interesting, but not in their webstore unfortunately.

Evgeniy
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djozz wrote:

The 1900K leds are interesting, but not in their webstore unfortunately.

You can wrote to Yuji managers. May be, Yuji has some 1900K .

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.

purduephotog
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Let me see- I might have some 1900Ks. I bought a bunch of 6500K and (another) Violet pumped die and can’t remember if it was the 2700K or the 1900K… they only had them in stock for a few weeks.

Sorry, it’s 2700K VTC. I just found the order number in the inbox… under HIGH CRI Web Store, not Yuji.

Evgeniy
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After long discussion with Yuji manager I received next answers :
If I want buy modules with VTC led, now available only 3200K modules, only constant voltage, or any other – but you must request (and pay) 50 pcs [modules, not led’s] each type (2700,3200, 5000, 5600K, constant voltage or constant current). Yuji really want sell it ?

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.

angerdan
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The european pendant to Yuji would be Ledon:
ledon-lamp.com/en/led-lamps/led-lamp-a60-7w-e27/

Most lamps have CRI 90.

djozz
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angerdan wrote:
The european pendant to Yuji would be Ledon:
http://www.ledon-lamp.com/en/led-lamps/led-lamp-a60-7w-e27/

Most lamps have CRI 90.

90CRI is something within the range of most led manufacturers, Yuji is somewhat special in that all their leds are 95CRI+. Osram has a 96CRI led range, but it is generally very uncommon.

I tried to find what leds are inside the Ledon bulbs, but they have managed to hide that from the internet very well…

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mattlward
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I would love to test a set of 95+ CRI bulbs, those have to look great!

EDC rotation:
FW1A, LH351D 4000k (second favorite)
FW3A, LH351D 3500k
FW3A, SST20 FD2 4000k
FW3A, Nichia 4000k sw40 r9080 (favorite light!)
FW3A, Cree XP-L Hi 5A3
Emisar D4V2, SST20 4000k
S2+, XM-L2 T6 4C

djozz
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thanks for the links, angerdan, i enjoyed reading some of it Smile . It seems like they produce their own leds/modules, but might source the led-dies elswhere (somewhere the USA is mentioned).

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texaspyro
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djozz wrote:
Osram has a 96CRI led range, but it is generally very uncommon.

I have 95CRI 10 watt PAR20 Osram/Sylvania bulbs in my office and kitchen. They put out 550 lumens (more than 50W halogens). Three years ago they were $30 each. I did have one (out of 16) of the bulbs die. It was in the same socket where halogens tended to blow after a month or two (usually taking out the $35 Lutron dimmer in the process).

angerdan
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I’d buy an Osram CRI92 LED-Lamp back in 2010.
It has an slightly visible rosa tint, so i’d liked it in my bathroom. Since the claimed 810lm turned out to be 1100lm, this Parathom Pro A80 was an real state of the art lamp back then.
siemens.com/press/pool/de/pressemitteilungen/2011/osram/osram-brilliant-mix-d.pdf
ledsmagazine.com/articles/2011/05/osram-opto-unveils-brilliant-mix-led-mixing-concept.html

@djozz:
You can see the chips of an Philips Hue Lux Bulb here:
ebay.de/itm/Philips-Hue-Bulb-E27-Color-gebrochener-Diffusor-/182056364363

purduephotog
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From my conversations with yuji they make phosphors. They’ve got contacts to make the LEDs and more so to make the modules.

The entry to get decent cost savings is around a few thousand which isn’t that much.

I do high cri hi colour temp… And so far they’re the only integrated single phosphor I see.

I would absolutely kill to have a remote phosphor 6500k violet pumped diode.

Evgeniy
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I can’t found any independent tests of Yuji LEDs, only 1 forum measurement.
And Yuji not sell CC (constant current) modules with all types of LEDs – only “if you ‘ll buy 50 pcs modules of each color temp.”.

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.

purduephotog
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I’m going to defend Yuji here a little bit- they sell phosphors. The modules they offer aren’t the best- their modules are for demonstrations- but they ARE very nicely built, thick aluminum, robust wire-insert connectors. I suppose you could gang 2x or 3x into a strip light if you wanted to and minimize additional manufacturing time- I’m personally working on designing some bars.

They were responsive about adding a ‘sampler pack’ of various dies and color temps. I wish they’d include a 1900K unit but I’m good with the 2700k.

Just an opinion. I like their stuff… and I’m pretty picky.

gamezawy
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what about bridgelux Vero decor series, they have a 2700 and 3000 K CCT with 97 CRI also 5600 K CCT with 90 CRI, i bought them from Digikey for lighting my Aquarium why buy unknown brand while you can buy a well know brand and much much much cheaper

i got the Vero 18 Decor with 5600 K CCT with 90 CRI it is about 70 Watts for 16$ only

purduephotog
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I love bridgelux . they don’t have high color temp high cri diodes though.

gamezawy wrote:
what about bridgelux Vero decor series, they have a 2700 and 3000 K CCT with 97 CRI also 5600 K CCT with 90 CRI, i bought them from Digikey for lighting my Aquarium why buy unknown brand while you can buy a well know brand and much much much cheaper

i got the Vero 18 Decor with 5600 K CCT with 90 CRI it is about 70 Watts for 16$ only

gamezawy
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Is there is in the world a 6500 K CCT LED Emitter with 90 CRI or higher, if yes give a link please

purduephotog
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Uhhhh… Yuji makes one. I’d use 1:1 vtc and btc pumped diodes.

Cree advertised one in their spec but if it was manufactured I couldn’t find it not request samples.

mattlward
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I have 4 of their warm white high CRI 5mm LEDs. I would love to buy more, but would never use 100 of them. Are any others interested in splitting an order?

EDC rotation:
FW1A, LH351D 4000k (second favorite)
FW3A, LH351D 3500k
FW3A, SST20 FD2 4000k
FW3A, Nichia 4000k sw40 r9080 (favorite light!)
FW3A, Cree XP-L Hi 5A3
Emisar D4V2, SST20 4000k
S2+, XM-L2 T6 4C

ImA4Wheelr
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^
Yes, interested. Have you gone through check out far enough to see how much shipping to you would be?

mattlward
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Shipping to the US is around 16 bux. If there were enough interest in the WW and NW, or even just the WW I would love to see this come together.

EDC rotation:
FW1A, LH351D 4000k (second favorite)
FW3A, LH351D 3500k
FW3A, SST20 FD2 4000k
FW3A, Nichia 4000k sw40 r9080 (favorite light!)
FW3A, Cree XP-L Hi 5A3
Emisar D4V2, SST20 4000k
S2+, XM-L2 T6 4C

Evgeniy
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purduephotog wrote:
The modules they offer aren’t the best- their modules are for demonstrations- but they ARE very nicely built, thick aluminum, robust wire-insert connectors. I suppose you could gang 2x or 3x into a strip light if you wanted to and minimize additional manufacturing time- I’m personally working on designing some bars. They were responsive about adding a ‘sampler pack’ of various dies and color temps.

Sampler pack of modules ?
You buy it ? What minimum quantity of each color temp ?
2 month ago I received answer “ minimum quantity =5 for constant voltage option “(with resistors) and “ minimum quantity =50 (!) for constant current option “.

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.

virencelights
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does Yuji make LEDs for an 18650 light?.
The only one I’m seeing coming is from Cree in a ZL at 95cri 5000k

Virence Custom Built; ArmyTek Viking Pro E21A 6500k 9080 Quadtrix, Jetbeam AAA 9080 E21A 9080 5700k, Jetbeam AAA Nichia HCRI Red Led.

djozz
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hcri wrote:
does Yuji make LEDs for an 18650 light?.
The only one I’m seeing coming is from Cree in a ZL at 95cri 5000k

Yuji does not make small high power leds (yet), just mid-power and COB leds. I think that making leds with a high illuminance requires special skills that not every manufacturer has.
semiman
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And 10000 lumens, 5500K, 90CRI for <$50 single quantity.

virencelights
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Hi
So what’s the chances of yuji making LEDs for flashlights ?.
I’m really after a 5600k hcri for an 18650.
What do you think Djozz?.

Thanks.

Virence Custom Built; ArmyTek Viking Pro E21A 6500k 9080 Quadtrix, Jetbeam AAA 9080 E21A 9080 5700k, Jetbeam AAA Nichia HCRI Red Led.

Texlite
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hcri wrote:
Hi
So what’s the chances of yuji making LEDs for flashlights ?.
I’m really after a 5600k hcri for an 18650.
What do you think Djozz?.

Thanks.

The XP-G3 is available in High CRI (>90) all the way up to 6000K or 6500K.

I have some of the 5000K High CRI, they are very nice. Cutter sells them, not sure if they’re OOS at the moment or in stock.

-Michael

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