LatticeBright "XM-L" Output test by Texas_Ace, interesting results

Thats what i meant

Sooo, if the die size is the same as XP-G2, how do they do de-doomed?

I tried dedomed a few awhile back for the heck of it, it failed everytime, even after sitting for a week in gas.

The bond wires are simply too inbedded in the dome and too thin and break off everytime.

Slicing the dome works ok but you loose a lot of output to the point that while the spot is tighter the intensity is only lightly higher.

Basically they are not worth dedoming.

The key is to find the right mixture of petrols: 40%etrolium ether + 40%A95 gas and 20% kerosene works miracles,especialy when boiling

Pure LB

Yet, it has its atvantages

- its running kinda cooler

- at 2.8 amps it gives decent 75k cds in a C8 host and 5000k like 3b tint, with absolutely no yellow

- its quite stable at that current

  • the hotspot is something between xml and xpg
    -ways better than the old XML

I’m really curious about this one:

https://www.aliexpress.com/store/product/Free-Shipping-led-cree-XLamp-tactical-flashlight-lamp-beads-led-XMK-U2-1A-6500K-300LM-3V/1930019_32560663036.html

“Cree XM-K”

Interesting results, like I said the best I ever tried was a sliced dome and was simply not impressed. I only tried it in 2 lights though and those I didn’t try that hard.

True, most ppl count it as garbage yet i`ve found its better than most( nearly all) Hi emitters at 2.8 amps in C8, X6 or so look alike lights, 150 lumens less yet it throws better, the tint is good and i have like 60-80 of those luying arround doing nothing ( came from various flashligt used as hosts)
They cant hold high amps though

My guess would be a much higher C/W than for genuine Cree emitters.

Mitko,

Thanks for the research.
Does this mean you are going to introduce a New Budget-Budget Flashlight line with hand picked Mko tints :slight_smile:

The new WolfsEyeMko version?
LOL

Later,
Keith

Surprisingly not really, although the tint was really not part of the test, just noting the tint of the LED for comparison purposes.

I have had real Cree’s with worse tints, I got 23 Skyray kings earlier this year and out of them only 3 had real Crees but tint wise 1 of them was no batter and if anything worse the most of the latticebright. The LB LED’s also varied a lot between lights, some had a fairly reasonable cool tint such as this LED and others had a much worse tint.

I even had one LB with a reasonably neutral tint.

Another thing I noticed is that the tint seems to improve as you drive them harder (well until they start turning blue due to heat anyways).

For the record, I am not defending the Latticebright LED’s, simply testing them and reporting the findings.

Thanks TA. Nice testing again.

Darn it. I just tossed out a POS Crazy Fire C8 with a lattice bright XM-L in it.

lol
This is weird…
I find myself wanting to look for a fake XM-L now… :smiley:

Nice work TA on this! I got a bunch of these LB's. Pretty sure I kept them all too, interesting...

I was just referring to the drop off above 4A, that seems low compared to Djozz’ tests. Poor thermal conductivity between the die and heat pad might explain that and not be surprising from a knock off emitter.

Ah, I got you now, :wink:

Yeah, the thermal resistance in these is most assuredly much higher then real Cree emitters. In fact I would say that is by far the largest difference. If the thermal performance was better I bet it could match the XP-G2 that is should be competing against.

The reflow should be good, same way I do all of mine although anything i possible. If I feel like it I might run this one up till it pops and replace it with another and then test the new one.

What heat sink are you attaching it to for the tests?

One of my many CPU heatsinks from the parts box. It is rated for a 90W CPU and I have ran it quite a bit higher then that back in the day.

It keeps the temps down so I can easily hold my fingers on it, I have not measured the exact temps though.

Thanks, that definitely puts the onus on the die.

Even with the drop off, up until then it has a lower Vf and slightly higher lumen output than the XPG-2, at least when well sinked. The question is whether the higher thermal resistance will nullify that in the less perfect sinking of a host where heat does build more quickly.