I really look forward to check out the results of those 4000-5000K R9050s.

Gonna be exciting to have torches with 1K+ continuous operation Rolls-Royce luminous flux. 

Cheers

Jerommel wrote:

We would have to know if both pads are doing the heat transfer to the star. if so, one could solder the LED on 2 half circles of copper and then put electrical isolation between it and the pill. That way you have direct thermal path to the star and a big surface with maybe kapton film and some goo on the star. This way you can avoid the fuss of re-designing the host flashlight. . [EDIT] Just learned that 90% of the heat transfer is through the cathode. But i think it’s a good option to isolate the star from the pill, not the LED from the star. [/EDIT]

How does a 0,04 °C•cm2/W thermal resistance with 17 Watt/m•K thermal conductivity appeal to you?
It’s far lower than the thermal resistance between LED die – solder point

Check this link.

clemence wrote:

Jerommel wrote:

We would have to know if both pads are doing the heat transfer to the star. if so, one could solder the LED on 2 half circles of copper and then put electrical isolation between it and the pill. That way you have direct thermal path to the star and a big surface with maybe kapton film and some goo on the star. This way you can avoid the fuss of re-designing the host flashlight. . [EDIT] Just learned that 90% of the heat transfer is through the cathode. But i think it’s a good option to isolate the star from the pill, not the LED from the star. [/EDIT]

How does a 0,04 °C•cm2/W thermal resistance with 17 Watt/m•K thermal conductivity appeal to you?
It’s far lower than the thermal resistance between LED die – solder point

Check this link.…
Judging by the way you say it, it’s probably pretty good
I’m not familiar with those technical terms and units.
But i gather it’s better than the usual ‘seal pads’ used for power transistors etc.

Now the question is; #1 where can we buy the new Nichia LEDs? #2 Where can we buy FujiPoly XR-m?

Gurthang wrote:

Now the question is; #1 where can we buy the new Nichia LEDs? #2 Where can we buy FujiPoly XR-m?

I plan to buy one full reel (3500 pcs) of them for my near future project. That's why Nichia sent me several samples to test. Nichia is very strict about MOQ to me, It doesn't even let me buy 500pcs.   It will be available in Q1 2017. Still waiting for my Fujipoly.....

Wow, a full reel?  Gonna open some e-shop?

Hope you'll be getting some R9050s.

Cheers

The plan is to use only the 3000K and 5700K. Yes, the 9050 is my target. If I needed lower CRI, I would go with XHP50 instead, easier on thermal design. No, it’s not for an e-shop, I have residential & shop display lighting projects here. But why not? if I could get some extras from bare emitter sale online, then I’ll do it.
Still working to get less than 500 pcs though.

If you could get some in ~4500k I would grab some for sure (assuming they work good after testing). 3000k is a bit too warm for a flashlight and 5700k a bit too cool. I have come to the conclusion that 4000-5000k is my personal sweet spot.

Obviously this is only if you could get a few extras tossed into your order (I am sure others would buy as well), I do not even remotely expect you to change your planned tints.

Texas_Ace wrote:

If you could get some in ~4500k I would grab some for sure (assuming they work good after testing). 3000k is a bit too warm for a flashlight and 5700k a bit too cool. I have come to the conclusion that 4000-5000k is my personal sweet spot.

Obviously this is only if you could get a few extras tossed into your order (I am sure others would buy as well), I do not even remotely expect you to change your planned tints.

Let’s see if I can get mixed CCT with the same MOQ =)

clemence wrote:

Texas_Ace wrote:

If you could get some in ~4500k I would grab some for sure (assuming they work good after testing). 3000k is a bit too warm for a flashlight and 5700k a bit too cool. I have come to the conclusion that 4000-5000k is my personal sweet spot.

Obviously this is only if you could get a few extras tossed into your order (I am sure others would buy as well), I do not even remotely expect you to change your planned tints.

Let’s if I can get mixed CCT with the same MOQ =)

If you could mix the tints a bit I am positive there would be some level of demand for some neutral tint versions with high CRI. How much only depends on the results from testing.

If Djozz could manage to keep a 12V 5700K one alive, i’d be very interested.
…actually also very interested in a 3000K one…
(but i’m probably not the only one..)

[edit]
6V is fine too.
[/edit]

Good news guys!
I just spoke to Nichia sales person, and I can mix the CCT and voltage for my next order. Hooray
Please vote your preferred CCT and voltage in my recent poll

POLL LINK

Sounds good! Have you asked about the 219c 90+ CRI versions that are supposed to be released now? Seems they are available up to 4500-5000k? according to the data sheet, if you can mix and match I know there are a lot of people that would like some 90+ CRI 219C’s.

Link to poll?

Texas_Ace wrote:

Sounds good! Have you asked about the 219c 90+ CRI versions that are supposed to be released now? Seems they are available up to 4500-5000k? according to the data sheet, if you can mix and match I know there are a lot of people that would like some 90+ CRI 219C's. Link to poll?

POLL LINK

clemence wrote:

Texas_Ace wrote:

Sounds good! Have you asked about the 219c 90+ CRI versions that are supposed to be released now? Seems they are available up to 4500-5000k? according to the data sheet, if you can mix and match I know there are a lot of people that would like some 90+ CRI 219C’s.

Link to poll?

No, it’s confirmed that the 219C Ra9050 only available in 3000K. If you look at the website the rest of the CCT only available in Ra8000.

https://www.nichia.co.jp/specification/products/led/NVSL219C-E.pdf

This pdf states 2700, 3000, 3500, and 4000K available as 9050.

maukka wrote:

clemence wrote:

Texas_Ace wrote:

Sounds good! Have you asked about the 219c 90+ CRI versions that are supposed to be released now? Seems they are available up to 4500-5000k? according to the data sheet, if you can mix and match I know there are a lot of people that would like some 90+ CRI 219C’s.

Link to poll?

No, it’s confirmed that the 219C Ra9050 only available in 3000K. If you look at the website the rest of the CCT only available in Ra8000.

https://www.nichia.co.jp/specification/products/led/NVSL219C-E.pdf

This pdf states 2700, 3000, 3500, and 4000K available as 9050.

I know, asked for it many times. And the answers always negative. I just called him yesterday.
Still not ready yet. They said “maybe” next year

clemence wrote:

No, it’s confirmed that the 219C Ra9050 only available in 3000K. If you look at the website the rest of the CCT only available in Ra8000.

Oh well, it was worth a shot. Depending on price I would still be down for some 219’s as well though, I am really liking tint mixing lately and 80+ CRI tint mixed lights look quite good as well.

Manual Man wrote:

A little more 144A info:
- Emitting area: 4x4mm (16mm2) - same configuration as a XHP35 (with lower forward voltage)?
- Aluminium Nitride substrate (285 W/(m·K))
- Gold contacts

Quote:

Distributor of the brand Nichia in Italy, *Welt Electronic* presents the new multichip series 144A. Nichia, a company of the first
magnitude in the products Mid Power and High Power, deals with the application market outdoor, street and tunnel lighting,
with a multichip Super Hight Power consists of four chips of 2 mm2, close to each other and arranged in a square: a plus optically unequaled.

These are the characteristics of the series 144A: Aluminium Nitride substrate, a component that increases the efficiency and
lowers the thermal resistance; Nichia Flip - Chip technology, which eliminates the process of wire bonding as a connection between the anode and cathode, presents a critical element in less than the technologies adopted by
other manufacturers; gold electrodes, which allow not to decay in application, because it is completely free from corrosion in an
environment saturated

Alumininium nitrite looks like the way to go creating a board for mounting these.. it should be reasonably cheap to have someone make a bunch of 16 and 20mm disks... then glue two pieces of copper sheet to the top to act as electrodes. Done.

Welt Electronics sounds like one possible source.

Non-oxide Ceramics – Aluminum Nitride (AlN): Ceramic Material with Very High Thermal Conductivity @ CeramTec

Who's gonna request a quote for a big box of standard 16 and 20mm boards with multiple wire contact points and thick copper traces to these guys?

Cheers 

Original posted on: Tue, 10/11/2016 - 20:09; typo fixup.

maukka wrote:

clemence wrote:

Texas_Ace wrote:

Sounds good! Have you asked about the 219c 90+ CRI versions that are supposed to be released now? Seems they are available up to 4500-5000k? according to the data sheet, if you can mix and match I know there are a lot of people that would like some 90+ CRI 219C’s.

Link to poll?

No, it’s confirmed that the 219C Ra9050 only available in 3000K. If you look at the website the rest of the CCT only available in Ra8000.

https://www.nichia.co.jp/specification/products/led/NVSL219C-E.pdf

This pdf states 2700, 3000, 3500, and 4000K available as 9050.

You’re right. I edited my post. Well maybe other Nichia distributors have it. I asked the Sout East Asia distributor in Singapore via Indonesian representative.

Barkuti wrote:

Manual Man wrote:

A little more 144A info:
- Emitting area: 4x4mm (16mm2) - same configuration as a XHP35 (with lower forward voltage)?
- Aluminium Nitride substrate (285 W/(m·K))
- Gold contacts

Quote:

Distributor of the brand Nichia in Italy, *Welt Electronic* presents the new multichip series 144A. Nichia, a company of the first
magnitude in the products Mid Power and High Power, deals with the application market outdoor, street and tunnel lighting,
with a multichip Super Hight Power consists of four chips of 2 mm2, close to each other and arranged in a square: a plus optically unequaled.

These are the characteristics of the series 144A: Aluminium Nitride substrate, a component that increases the efficiency and
lowers the thermal resistance; Nichia Flip - Chip technology, which eliminates the process of wire bonding as a connection between the anode and cathode, presents a critical element in less than the technologies adopted by
other manufacturers; gold electrodes, which allow not to decay in application, because it is completely free from corrosion in an
environment saturated

Alumininium nitrite looks like the way to go creating a board for mounting these.. it should be reasonably cheap to have someone make a bunch of 16 and 20mm disks... then glue two pieces of copper sheet to the top to act as electrodes. Done.

Welt Electronics sounds like one possible source.

Non-oxide Ceramics – Aluminum Nitride (AlN): Ceramic Material with Very High Thermal Conductivity @ CeramTec

Who's gonna request a quote for a big box of standard 16 and 20mm boards with multiple wire contact point and thick copper traces to these guys?

 

Cheers 

Interesting material....You go (buy) first, I'll follow 

clemence wrote:

maukka wrote:

https://www.nichia.co.jp/specification/products/led/NVSL219C-E.pdf

This pdf states 2700, 3000, 3500, and 4000K available as 9050.

You’re right. I edited my post. Well maybe other Nichia distributors have it. I asked the Sout East Asia distributor in Singapore via Indonesian representative.

Also the Reylight Pineapple is supposed to be 219C 4000K R9050.

GOOD NEWS!!!

I can get the 219C 4000K Ra9050. It’s available now

clemence wrote:

GOOD NEWS!!!

I can get the 219C 4000K Ra9050. It’s available now

I couldn’t find the CRI of them for certain, i think it’s 92 (?)

clemence wrote:

GOOD NEWS!!!

I can get the 219C 4000K Ra9050. It’s available now

Very nice, if you can get these for a good price I would get a few, I do prefer 4500k myself so it would keep me from stocking up.

I can’t wait to see the test results.

The 144A test results? Djozz output test here and maukka CRI test here.

Texas_Ace wrote:

clemence wrote:

GOOD NEWS!!!

I can get the 219C 4000K Ra9050. It’s available now

Very nice, if you can get these for a good price I would get a few, I do prefer 4500k myself so it would keep me from stocking up.

No 4500K available based on the data sheet. The 9050 only available from 2700K-4000K, the rest is Ra8000 max.
The sell price is approximately the same as the other sellers here, also quantity sensitive.
I can’t beat China based seller since the courier services are extremely cheap there. For small order quantity they’re your best bet.

- Clemence -

Texas_Ace wrote:

clemence wrote:

GOOD NEWS!!!

I can get the 219C 4000K Ra9050. It’s available now

Very nice, if you can get these for a good price I would get a few, I do prefer 4500k myself so it would keep me from stocking up.

But it’s possible to arrange several stocker points to save shipping cost. For example: US, Europe, and Asia representatives hahahaha
We could start a www.Budgetroniclightings.com then