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Why are Yuji's mini LEDs so expensive in comparison to other high CRI LEDs? Why should I buy them?

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benmergelsberg
(@benmergelsberg)
Posts: 2
New Member
Topic starter
 

Hi Matt, great Videos you make, thank you so much. I am a light artist so I am kind of often working on things you describe so well in your videos. I have one specific question: in your Video on building an artificial sun you linked to Yuji collection of LEDS around 9 Watts. the ones with a CRI of 98 are quite expensive - 135 for 5 pieces. CREE offers LEDS witht the same CRI and Luminous Flux but at almost 10% of the price. here is an example:

https://www.mouser.com/ProductDetail/941-CMA1303C0Z0A30H

 

Why are Yuji's LEDs so much more expensive? Am  I missing some relevant aspect?

 

Thank you so much!

 

Ben

 
Posted : 06/06/2022 1:34 pm
DIY Perks
(@diyperks)
Posts: 81
Estimable Member Admin
 

I don't have any hard answers but my best guess is that Yuji were one of the first manufacturers to focus on really good and natural colour rendering in an era where there wasn't much recognition for it, so they have first mover advantage. From my experience they've tuned the output so well that it looks natural - some LEDs with a high CRI don't look as 'true to life' as you'd think, because CRI isn't a perfect measure. Some others can have a sort of red cast which is visible on skin tones, but Yuji seems to render them a touch warmer.

 

That said, even some of the cheap Chinese LEDs that feature high CRI are pretty good these days - I had a sample that uses a UV diode and results in a light output that matches a cloudy day on a spectrophotometer, which is really impressive.

 

So, in a nutshell - try the cheaper ones first, and if you like them they will probably do the job for you!

 
Posted : 06/06/2022 1:52 pm
benmergelsberg
(@benmergelsberg)
Posts: 2
New Member
Topic starter
 

Yea that makes sense. I did compare the photometric reports and could not find huge differences but that was only by comparing the curves visually. I guess I will have to try it out. One more question: sometimes, because they are made up of several LEDs  COB LEDs break easier. Did you have any bad experience with the Yuji LEDs?

 

Thanks!

 
Posted : 06/06/2022 2:09 pm
DIY Perks
(@diyperks)
Posts: 81
Estimable Member Admin
 

The first ever build I did with a Yuji LED was the Sunblaster 2.0 and that's still being used every single day as a studio light, 6 years later. So long as you cool them well, COB LEDs can last ages.

 
Posted : 06/06/2022 6:41 pm
DIY LED U-Home
(@diy-led-u-home)
Posts: 5
Active Member
 
Posted by: @benmergelsberg

Hi Matt, great Videos you make, thank you so much. I am a light artist so I am kind of often working on things you describe so well in your videos. I have one specific question: in your Video on building an artificial sun you linked to Yuji collection of LEDS around 9 Watts. the ones with a CRI of 98 are quite expensive - 135 for 5 pieces. CREE offers LEDS witht the same CRI and Luminous Flux but at almost 10% of the price. here is an example:

https://www.mouser.com/ProductDetail/941-CMA1303C0Z0A30H

 

Why are Yuji's LEDs so much more expensive? Am  I missing some relevant aspect?

 

Thank you so much!

 

Ben

Hi Ben,

We think you can try to use our high CRI COB LED first, here is our DIY LED U-Home Brand store, https://www.diyledu-home.com/

We also support to do custom-made COB LED if you need bulk. DIY Perks also used our LED products to build some projects before.

 

Best regards,

Bruce

图片
图片

 

Official Brand Store, diyledu-home.com
Our Tik tok account, @diyleduhome
Our Tik tok store, https://www.tiktok.com/@diyleduhome
Aliexpress store, https://diyledu-home520.aliexpress.com/store/1101410436
Ebay store, https://www.ebay.com/usr/joy-street, or https://www.ebay.com/str/indeedstore01

 
Posted : 07/06/2022 5:47 am
Tim
 Tim
(@tim)
Posts: 34
Eminent Member
 

@diyperks could you specify the brand and model? I live in China and would like to buy a couple of good ones that aren't costly

 
Posted : 07/06/2022 12:35 pm
DIY Perks
(@diyperks)
Posts: 81
Estimable Member Admin
 

I actually do recommend trying the LED's in Bruce's post. That's my go-to brand for cheaper LEDs with good CRI, and I've been using their LEDs for years alongside Yuji. I don't know if they have a China-facing store option though.

I used their strips in the studio lights project, and just like the Yuji Sunblaster they're still being used daily without issues (almost 4 years now).

 

Note: I'm not affiliated with them, though they have provided LEDs for previous projects on request in return for using screen grabs from the videos.

 
Posted : 07/06/2022 6:46 pm
DIY LED U-Home
(@diy-led-u-home)
Posts: 5
Active Member
 

@tim you can contact us via QQ, 147940178, we have our own brand taobao store in China.

Official Brand Store, diyledu-home.com
Our Tik tok account, @diyleduhome
Our Tik tok store, https://www.tiktok.com/@diyleduhome
Aliexpress store, https://diyledu-home520.aliexpress.com/store/1101410436
Ebay store, https://www.ebay.com/usr/joy-street, or https://www.ebay.com/str/indeedstore01

 
Posted : 08/06/2022 1:41 am
Yujileds and Yuji Lighting
(@yujileds-and-yuji-lighting)
Posts: 2
Active Member
 

Dear Ben,

 

thank you for your topic, we greatly appreciate your comments on this; it would be an excellent case for us. 

We admit that we didn't explain well about our CRI 98+ LED on the online shop, actually, the expensive LED you mentioned is based on our VTC technology, which is an entirely different theory than a nominal high CRI LED. Our spectral engineering for the VTC technology is an innovative solution that there are rarely LED manufacturers that can use this technology, especially for mature commercialization. The spectrum of the VTC technology is based on the sun spectrum simulation - in the spectral power distribution level, while high CRI is just a result of this spectrum but not the reason we make it - the reason and value of the sun spectrum are so widely desired rather than general lighting, e.g. for horticulture lighting, for camera/detector sensor, for human-centric healthy lighting...anywhere you need the sun. 

In Matt's previous videos, we provided him the LEDs based on our standard high CRI technology, and he also mentioned it as an "artificial sun", here we should distinguish the different concepts:

  • The "artificial sun" is a visual appearance, it looks like the sunlight feeling or sunlight shape;
  • VTC technology is essentially the sunlight simulation at the "gene reproduce" level, we can say that VTC is the non-visual artificial sun effect, but is the real sun. 
CRI

Therefore, CRI cannot be a differentiated factor, actually they both have high CRI scores. 

To achieve the VTC technology, raw materials and production procedures are different and specific, these are the main reasons for the higher cost. We have been focused on high CRI LED lighting for many years and deeply understand the high color quality lighting is not just about the CRI score, many other details should be aware and controlled and these generate "invisible" costs behind. 

We would like to talk with you more regarding the advanced LED technology here, if you are interested. 

This post was modified 3 months ago 2 times by Yujileds and Yuji Lighting
 
Posted : 08/09/2022 2:54 am
CDon
 CDon
(@cdon)
Posts: 2
New Member
 

Hey guys, this is all very interesting. 
I have a question for ye: 

I find myself being affected by SAD each January and February and was considering buying one of those 

lights that they sell which are supposed to help mimic the natural light from the Sun.

@ Yujileds and Yuji Lighting are you saying that the light given off by your LEDs would be an effective 

substitute for natural sunlight in this instance? Do you follow my meaning? 

Thank in advance

Best

Conor

 
Posted : 21/11/2022 12:43 pm