LED test / review – Lumileds Luxeon MZ 5700 K min. 90 CRI (3V) – Finally! High CRI, High power, beautiful light

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EasyB
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This LED looks like a great way to get a lot of light from a single cell light. I did not know about it. I guess the non standard footprint has kept it from seeing more use by flashlight modders.

Jerommel
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Nice LED for pebbled TIR optics. Thumbs Up

koef3
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The use of XP boards is possible, though. I’m own a flashlight with the MZ already.

But this LED was called ‘power hungry’ to get 2800 lumens of high CRI light, which is true in some point.

Because that there are not much boost driver or compact modding hosts for multi battery use out there the needed amperage is a problem indeed because the current is way too high which ‘traditional’ drivers for single battery can handle. In my JAXMAN M8 the Luxeon MZ is powered by the A17DD_L and the FET gets really! hot at Turbo (approx. 13 Amps with more than 100 deg C on FET!) which should lowers it’s lifetime rapidly.

For building a triple I would recommend the 12 V variant of the MZ (LMZ9-SW57) and a hypothetical high power buck/boost driver with 4S battery config. Because of the needed diffusor or matte optic bigger reflectors of the also bigger host would also increase the throw.

My LED tests: Cree SC5 based LEDs (WIP!)  ---  Nichia 319AT 83 CRI - Optisolis (3000/5000 K) - Lumileds Luxeon LXML-PWD9 - Luxeon MZ 5700 K (90 CRI, 3 V) - Luxeon V (CSP) 4000 K 70CRI - Luminus SST-40-W (+ dedomed) - Cree XP-L2 (+ High CRI variant) - XHP35 HI - XHP70.2 - CXA1304 COB - OSRAM OSLON Black Flat HWQP - SYNIOS DMLQ31.SGLE UW Q8WP - unknown 5050 LED ---- finished: JAXMAN M8 (Mini C8) HighCRI Triple

EasyB
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I just ordered a couple of the 3V 70cri type from digikey. I’m thinking it might work well in an EE X6 maybe with ledil iris TIR.

djozz
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EasyB wrote:
I just ordered a couple of the 3V 70cri type from digikey. I’m thinking it might work well in an EE X6 maybe with ledil iris TIR.

Good luck with the triple tricky reflow! Innocent Smile
The_Driver
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I think that will make a great light!

EasyB
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led4power wrote:

Some triples and quads can have higher lumens/efficiency, but even with mild OP reflector, this LED should have much better throw.


 


 

Do you have any throw numbers from the testing you’ve done?

led4power
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Soon I'll make few builds, but theoretically light with this led (T bin) should have ~2 times the throw of domed XM-L2 or domed XP-L in same reflector at close to max. power (14-15Amps).

EasyB
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led4power wrote:

Soon I’ll make few builds, but theoretically light with this led (T bin) should have ~2 times the throw of domed XM-L2 or domed XP-L in same reflector at close to max. power (14-15Amps).


That would be great, but is that taking into account the cross between the dies? In reflector lights the cross reduces throw because when you look into the reflector there is always some area reflecting the dark cross.

I will also report my findings when I test the LED in a C8.

led4power
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There should be no cross/donut if OP reflector is used, of course this reduces throw, but it still should be way better than any triple/quad. Gap between dies is smaller than XHP-50 or XHP-70, and should be similar to dedomed/shaved XHP-50.

EasyB
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I did some testing of this LED in a supfire L6 (26650 light with C8 head). I purchased the LMZ7-QW57 (3V 5700K) emitter from digi-key. I reflowed on a 20mm Tpad XP footprint MCPCB (I got it on the first try Cool ). With a fully charged 30Q I measured 11.7A by measuring the voltage across a 10mOhm shunt in place of the tailcap (this cell is old so the current might be higher with a new cell).

The results are a bit disappointing. I measured 69Kcd at 6.78m (with smooth reflector, reading taken at point with highest lux), and less than 2400 lumens OTF (ceiling bounce test).

The_Driver
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A XHP-50 4500K 90CRI de-domed will do 2000 otf lumens at 6V and 5A (10A for the Luxeon 3V). So in this regard it’s actually quite similar. This shouldn’t come as a suprise as the Luxeon M and MZ are also from 2015. They aren’t new.

How do you like the tint?

EasyB
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Mine is the 70 CRI version. I would say the tint is fine. It is definitely on the cooler side but not noticeably blue like a cree 1A.

The_Driver
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EasyB wrote:
Mine is the 70 CRI version. I would say the tint is fine. It is definitely on the cooler side but not noticeably blue like a cree 1A.

Ok, then it really isn’t that efficient. Sad
gravelmonkey
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Does luxeon make a domeless emitter with a single one of these dies?

I considered upgrading my BLF Q8 with 4 of the HCRI MZ’s but realised something would probably melt if I tried!

The_Driver
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gravelmonkey wrote:
Does luxeon make a domeless emitter with a single one of these dies?

Luxeon Z ES (German test here)

gravelmonkey
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The_Driver wrote:
gravelmonkey wrote:
Does luxeon make a domeless emitter with a single one of these dies?

Luxeon Z ES (German test here)

Thank you!

Looks like it wouldn’t work for a Q8, I misjudged the size and thought the dies were “XP-G” size.

Back to the drawing board. A 6V MZ in a convoy L6 looks like it might work!

The_Driver
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They are basically dedomed XP-G size, very similar.

A 6V variant would definitely work in the L6. The only one that is not so great is the XHP-50 because of the rather high Vf.

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I am wondering WHO will be the first lunatic to put 3 LMZ7-QW65/QW57s under 10507 with VTC5A and witness quickest step down/throw out of hand/deflow/melt optics in history Party

EDIT: I forgot about poor little omten 1288 Tired

The_Driver
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That would indeed be glorious! Evil
I think a FETie switch would make sense :).

I wonder if there will be a donut hole when using clear optics and three LEDs.

led4power
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Below ~8Amps per LED, there is no sense to use MZ instead of Luxeon V, and MZ is much less compatible with small optics.

PH_Oton
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Well about FETed switch I am not feeling a need for one. That would be making a whole built “sensible and safe” which by all means it is not. For the sake of care and longevity for sure but I would love to see omten in action Innocent I am wondering the same about hole, especially with potential one inside of trousers pocket Big Smile

The_Driver
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led4power wrote:

Below ~8Amps per LED, there is no sense to use MZ instead of Luxeon V, and MZ is much less compatible with small optics.

High-cri Wink

PH_Oton
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I Agree with this one although I am highly concerned that if I decide to build one with S2+ in a month or so Lumileds will maybe release HiCRI Vs and then I will regret?

Carclo stated efficiency of 92% for 10507 with MZs.

zespectre
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Very interesting.

Tonights forecast, 100% chance of dark.

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Yes, there would be a hole with clear optics. In fact according to carclo frosted gives more throw.
You can see beam shapes on the carclo site.

The_Driver
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Agro wrote:
Yes, there would be a hole with clear optics. In fact according to carclo frosted gives more throw. You can see beam shapes on the carclo site.

Yes, that’s actually just what I did after posting Wink Facepalm
They haven’t tested the Luxeon V yet, though. I know it wont be good but actual numbers and beamshots are still a nice thing.

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LMZ9-QW57
Power at rated maximum: 14.40 W (peak: 16.72 W)
Efficiency at 4,800 mA: 93.4 lm/W (peak: 89.3 lm/W)

L1V1 led4power sample

Power at rated maximum: 16.42 W
Efficiency at 4,800 mA: 96.9 lm/W

If LMZ7-QW57 is about 30% more efficient than 90CRI verson it WOULD make sense to use it instead of V under 8A?

led4power
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MZ would be brighter of course at any current, and Vf is crazy low,CC regulation would be maintained ~100% of time even at high mode, I'm just not sure how well it would work with small optics, total die size is bigger than tir entrance holes. Since I got 20mm mosDTP boards,I will build M1 with 5000K 80CRI  MZ, just to see how they look in flashlight, XHP50.2 was total disappointment because of terrible tint/coronas.

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I wonder what’s the relation between Luxeon MZ, Luxeon M and Luxeon MX…
Is M the same as MZ, but with a dome and larger package?
If yes, dedoming should bring the same performance at low currents and better at high – due to larger thermal pads.
MX is an upgraded variant of M. Eyeballing photos it seems to have about the same die sizes. And doesn’t look flip chip. And emission profile looks the same too. Is there a chance of it being better than MZ?

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