some crude measurements of the MT-G2 on a Noctigon board

Thanks for the confirmation Chicago X! :slight_smile:

Interesting test. I would love to see testing on every led in a "real world" situation, say a 3/4" dia x 1/8" thick, round of Aluminum with the led/star on top, instead of huge chunks of aluminum. With the huge heat sink, many things are possible, but with just a small heat sink (like in a flashlight), many things are not possible.

I am not knocking your test. It's good to know what the led can do in "the lab" and I am grateful for your hard work.

Thank you for posting your results here.

Very good info. Thank you very much for the hard work and reporting. This emitter keeps getting more interesting.

Wow. Thanks djozz.

Very nice test, good numbers and well done. Thanks, gives me some ideas…comfychair can be my tester :wink: Would love to see 3000 lumens out of my S2200, would be totally awesome!

Thanks for all the appreciation for the test, it was fun doing it, I had to close the curtains to prevent strange looks from the neighbours :-)

This is great info djozz!

Thanks for doing it, and sharing.

7amps and 7 volts… 49W!! And output is still not leveling out!! Sick! 8)
I know you have good heatsinking here, but with that heat sinking, it sure looks like the sky-is the limit! At least until… poff… 0:)

I also take note the djozz-lumens is lower than Match lumens (No surprise, due to reflector, lens and such) But since you had the emitter on copper, the lumen curve does not flatten out as much as the ones Mach posted (his emitter was on aluminium). This just shows that the copper (Noctigon) mcpcb seems to do its job… :slight_smile: Which is good to know…

Direct drive off two 26650s? Wonder what the current would level off at after the voltage sag...

The Vfs I measured with my QL-355 on an Aluminum MCPCB (2mm thick) place over an aluminum finned heatsink (70mm diameter, 20mm thick) , 26C ambient temperature. No active cooling.

Nice pics!

Only if this leds where CW….or NW, i hate warm white.

It's not WW.

Yea but its to yellowish to my liking :frowning:

Have you seen it real life and not on pictures?
On pictures the white balance on the camera can change any tint to whatever you want it to be. Pictures are rarely an accurate presentation of real life tint.

It's 5000K so it's NW, many like it, if you really like NW than it's like other NWs or better. Maybe you want a "pure white" tint which would rather be considered CW.

I’m sorry, i saw few videos, and it might be that they where using like <5000K versions, it was alot yellowish then the other leds in the video.

5000K is good, or maybe in the video it was just the camera oversaturation.

Any recommendations on MT-G2 replacements? I can see that the LED is falling behind in output and efficiency, but do newer leds like XHP70.2 emit an equally nice beam?

There is for sure considering the amount of options available. I haven’t found one though, for me the MT-G2 is proving to be tough to replace in terms of beam quality.

Mike C, you hit the nail on the head. There are many leds that could maybe be used, but the quality of the light that this one makes in the right reflector is not something that will be easy to replace. The latest generaton of the MT-G2 80 CRI 4000k looks very good when running.