Luminus SST-70, a sample tested

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djozz
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Luminus SST-70, a sample tested

      

Thanks to Jacky from LuckySun who got his hands on some samples, and to TheOnlyDocc who negotiated to get one sent to me for testing, I received one Of the new SST-70 leds from Luminus. There is no datasheet yet as far as I know as the SST-70 is at this moment not even listed on the Luminus website yet (it does show up in their design files though).

Edit nov17,2020: datasheet popped on the Luminus website: 

https://download.luminus.com/datasheets/Luminus_SST-70X-W_Datasheet.pdf

 

It is a XM-size (5050) 6V/12V quad die led and is thus a direct replacement for the Cree XHP50. The die size however is smaller, even closer to the XHP35 than the XHP50. Let's see how good it is.

First some comparison pictures, left with Nichia 144A, XHP50.2 and XM-L2, right with XHP50.2 and (a warm) XHP35 hd (the version with a dome):

  

Beam and tint

I placed two reflectors on top of the led running at 1A and looked at the beam on the ceiling two meters away (the distance is not ideal but it gives a good idea). Left with S2+ reflector (small OP), right with an X6 reflector (bit throwier smooth). In both reflectors the SST-70 produces a fine beam, no donut holes, no Cree rainbow. The photo's are underexposed to show the hotspot well.

  

 The CCT of my sample is around 6000K (depending on how it is measured, I can not measure integrated tint like maukka can, the hotspot from a reflector is 5900K), and CRI is 67.

 

Performance

The output test was done like most of my emitter tests over the last years. I described it in detail in my XP-L test (found via my sigline), with the minor difference, that should not matter significantly for the results, that I used my Integrating sphere no. II instead of no. I.
In summary: 1) just one led of each type was tested, reflowed on a DTPcopper board  2) I used my large version II integrating sphere with high quality luxmeter, 3) the output numbers and voltages were measured with the led close to ‘steady state’ for each current, so warmed up and settled (I take a minute before each current increase), you should be able to get these numbers in a well heatsinked flashlight. Mind that these are output numbers of the bare led; in a flashlight there will be losses from light obstructions, lens and optic, 4) output is in ‘djozz-lumen’ defined as 1/550 of the output of my Sunwayman D40A on high setting, which I hope is close to the real lumen (recent comparisons show that it is actually between 7 and 11% high), but at least is consistent over all my previous emitter tests done in integrating spheres, so all my output data over the past years can be directly compared.

 

I added old data of a Cree XHP50.2 in the graph for comparison. Mind that in the meantime better output bins than J4 are available, KD sells K2 bins of the XHP50.2 atm.

What can be seen?

*this SST-70 led performs similar to a tested J4 bin of the XHP50.2 although at higher currents the output levels out sooner. 

*but with its die surface area of (estimated from the pics) only 55%-60% of a XHP50.2, the throw will be significantly better. The throw will not match a XHP35 hi (the domeless led), but my guess is that it is not really far off, and with 80% more output. If one manages to dedome the SST-70 succesfully, the XHP35 will be beaten in throw, and with 50% more output (this is all my guesstimation).

*I stopped the test at 10A where the output was already dropping, to save the led. A few days later I did a quick voltage/output check and the led did not perform less than at the time of the test.

*my performance hotspot for this led would be 6A/4000 lumen.

 

Conclusion:

Looks like a great led, time will tell if it will deliver what this test promises. 

And please Luminus bring us the 3V version!

  

Edited by: djozz on 11/17/2020 - 14:19
SKV89
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Man I get some excited every time I see these emitter test post from you or Maukka! This looks promising. Hopefully it performs better than the XHP50.2.

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Great! A serious competition to S2WP? Please Luminus bring us higher CRI version. Smile

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Agro wrote:
Great! A serious competition to S2WP? Please Luminus bring us higher CRI version. Smile

I would not mind testing a S2WP, do you have a link where I can buy them?
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Wow! Yeah, hi cri is my dream. 3V in a bit warmer colorwould be also nice

WTB Titanium 4sevens 2xAA tube

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thanks for the test!

subscribed

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if you do not find what you are looking for :

ask MARTIN@M4DM4X.COM - i will save you money!

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Would love to see this in an EC01. Domeless would be even better. Now hurry up Luminus and make a 3V version.

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djozz wrote:
Agro wrote:
Great! A serious competition to S2WP? Please Luminus bring us higher CRI version. Smile

I would not mind testing a S2WP, do you have a link where I can buy them?

Ask Neal from Nealsgadgets. He could probably get you one.
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good led

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Djozz, any chance to get raw data behind the chart?

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Thanks, that beam looks really nice! How was the tint (duv) on yours? I take it that you’re not going to sacrifice that in a dedoming experiment? Smile

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Thanks for the testing djozz.
I wonder how it dedomes also but its always a risk.

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pearlriver wrote:

good led

Looks like a huge quad reflector. Would you mind sharing some build tidbits?

Thanks. 

Deleting a post and redoing it causes the forum thread answer notifications to become invalid. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid quoting lenghty posts, namely with nested quotes. Trim the quote down to the essential. Helps with forum neatness and legibility. Thanks.

Localized AliExpress links mess up with the language setting of whoever clicks or taps on them. While this is a fault of the AliExpress system, turning localized links into global links helps and is easy; just change the locale letters in the url for www. Example:

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Barkuti wrote:

pearlriver wrote:


good led


Looks like a huge quad reflector. Would you mind sharing some build tidbits?


Thanks. 

Looks like TN40S or Jetbeam T6

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Lexel wrote:
Barkuti wrote:

pearlriver wrote:


good led


Looks like a huge quad reflector. Would you mind sharing some build tidbits?


Thanks. 

Looks like TN40S or Jetbeam T6


Another leaked photo from haikelite.
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maukka wrote:
… I take it that you're not going to sacrifice that in a dedoming experiment? Smile

With a feeler gauge set plus dremel type multitool with dedicated locator accessory, dedoming can be made easy (check this).

Of course, it is first required to know how low can you go. Wink 

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pearlriver, it would be nice if you could edit your previous posts' images (#9#15) and set their relative width to 100% max. Attach a {width:100%} string between the first exclamation mark and the image url:

 

!https://ftp.bmp.ovh/imgs/2019/09/ca970f7aab5a093e.jpg! becomes

!{width:100%}https://ftp.bmp.ovh/imgs/2019/09/ca970f7aab5a093e.jpg!

 

!https://ftp.bmp.ovh/imgs/2019/09/093563c9e9fca947.jpg! turns into

!{width:100%}https://ftp.bmp.ovh/imgs/2019/09/093563c9e9fca947.jpg!

 

 

Deleting a post and redoing it causes the forum thread answer notifications to become invalid. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid quoting lenghty posts, namely with nested quotes. Trim the quote down to the essential. Helps with forum neatness and legibility. Thanks.

Localized AliExpress links mess up with the language setting of whoever clicks or taps on them. While this is a fault of the AliExpress system, turning localized links into global links helps and is easy; just change the locale letters in the url for www. Example:

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djozz
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maukka wrote:
Thanks, that beam looks really nice! How was the tint (duv) on yours? I take it that you’re not going to sacrifice that in a dedoming experiment? Smile

I never was very good in dedoming a SST-40 so the chances would not be good, and I would not have a suitable host for the dedomed SST-70 anyway (you want 6V 6A and a big smooth reflector for a proper dedomed SST-70 build).

The tint is plain cool white, seems no different than the cool white SST-40 tint, but if you measure it, it is quite a bit above the BBL. Here’s the center of the hotspot from a S2+ reflector, with the led at 1A (CRI=67.3,R9=-40)

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Agro wrote:
Djozz, any chance to get raw data behind the chart?

Sure. The numbers are convenient to have but also they suggest an accuracy that is not there. That is why I usually just post charts, it removes the false preciseness from the numbers.
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djozz wrote:
The tint is plain cool white, seems no different than the cool white SST-40 tint, but if you measure it, it is quite a bit above the BBL. Here’s the center of the hotspot from a S2+ reflector, with the led at 1A (CRI=67.3,R9=-40)

Yeah, looks very similar. On such high color temps I don’t find some green so objectionable, even though +0.006 is quite a lot. As is, I probably wouldn’t find any practical uses for the emitter though.

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Dedoming it would likely fix the high Duv, doesn't it? 

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Thanks djozz. Smile
Seeing the numbers I’m not sure it will outthrow XHP35 HI E2. I’m seeing 160 djozz-cd/mm² with 20% dedoming losses while XHP35 got 172 koef3-cd/mm².
Now…koef3 got better cooling and your lm are known to be a little high (though his might be as well).
So…seems like the same ballpark to me when it comes to throw.
Efficiency is within error margin as well (comparing at the same luminosity).
So…it’s much like a bigger XHP35 with dome and CRI70-only.
GXB172 would be great for it. It’s sad how this driver is still not easily available.

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Thanks to the existence of “XHP70 drivers” it is possible to get some stock drivers configured for up to 4.8 - 5A driving current in ∅22mm size. User Windforce did some testing over a Manta Ray XHP70 driver bought from AliExpress, see Testing boost drivers' thread.

Of course Wink I found rock-bottom price seller for the Manta Ray XHP50/XHP70 drivers:

  1. ∅22mm “XHP50” max 3A 5-mode unit.
  2. ∅22mm “XHP70” max 4.8A 6-mode unit.

Drivers look the  same, only different firmware I'd say.

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Please avoid quoting lenghty posts, namely with nested quotes. Trim the quote down to the essential. Helps with forum neatness and legibility. Thanks.

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Agro wrote:
Thanks djozz. Smile
Seeing the numbers I’m not sure it will outthrow XHP35 HI E2. I’m seeing 160 djozz-cd/mm² with 20% dedoming losses while XHP35 got 172 koef3-cd/mm².
Now…koef3 got better cooling and your lm are known to be a little high (though his might be as well).
So…seems like the same ballpark to me when it comes to throw.
Efficiency is within error margin as well (comparing at the same luminosity).
So…it’s much like a bigger XHP35 with dome and CRI70-only.
GXB172 would be great for it. It’s sad how this driver is still not easily available.

My guess was based on very rough eye-balling, so I’m sure your calculations tell the better story Smile
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I’m in progress of building a Manta Ray C8.2 2S with LD-B4HV driver and XHP50.2. I would love to try this LED out for increased throw….

Armytek Prime C1 Pro, Armytek Prime C2 Pro, Armytek Tiara C1 Pro, Astrolux MF01 Mini, BLF Q8, BLF A6, BLF FW1A, BLF FW3A, BLF FW3C, BLF LT1, Convoy L6, Convoy C8+ , Convoy S3, Convoy M21A, Convoy S11, Emisar D4, Fireflies E07, Jaxman E2L, Lumintop EDC18, Manta Ray C8.2 long version, Olight S1R Baton II special edition series, S2R Baton II, Nitecore HC65, Olight H1R Nova.

https://photos.app.goo.gl/JaJaDv4V838AEJf39

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KD says in stock for a 7500K emitter, $6.80 sounds pretty ok.
link

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djozz wrote:
KD says in stock for a 7500K emitter, $6.80 sounds pretty ok. link

It’s a pity it’s 7500K. I’ll probably buy one and test it anyway…

Armytek Prime C1 Pro, Armytek Prime C2 Pro, Armytek Tiara C1 Pro, Astrolux MF01 Mini, BLF Q8, BLF A6, BLF FW1A, BLF FW3A, BLF FW3C, BLF LT1, Convoy L6, Convoy C8+ , Convoy S3, Convoy M21A, Convoy S11, Emisar D4, Fireflies E07, Jaxman E2L, Lumintop EDC18, Manta Ray C8.2 long version, Olight S1R Baton II special edition series, S2R Baton II, Nitecore HC65, Olight H1R Nova.

https://photos.app.goo.gl/JaJaDv4V838AEJf39

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Uh 7500k…

It’s really easy to see that the SST-70 is a very new LED, meaning to achieve high brightness bins, you need a high CCT to achieve them.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

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No go for me with that color Sad

WTB Titanium 4sevens 2xAA tube

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djozz thanks for the testing. Since the die is closer in size to XHP-35, it would be nice to see testing at 12V, with a chart comparing XHP-50.2 also at 12V, and XHP-35, which is only available in 12V. That way, we could see where the SST-70 really falls between those two regarding output, voltage, and current. Is there any chance of that happening? Innocent

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No Innocent
I do not have enough energy/time/dedication etc. to do all that. Even if I would promise it I will probably keep doing fun stuff first and this will end up nowhere (I have broken a few promises in the past, could not get myself doing it).
We need a HKJ of led testing for that, who is never tired of doing vast amounts of tests. Me I just pick out a promising led every now and then.

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