GB 351D closed.

My LEDs are here. Thanks AEDe!

Is there any chance we can get the Groupbuy reopen, i really love this led

The M43 with 219B-V1 R9050 already does 4400lm. The 219C version should do maybe 20% more. Your Samsung LEDs should be more similar to the 219C.

Mine arrived. Thanks AEDe!

The Noctigon M43 is an unregulated flashlight. This means those LH351D emitters won't draw as much current as 219Cs in it, not even close! On the other hand, while the LH351Ds may output a comparable deal of light, they're going to do it at much lower current draw and heat.

Cheers ^:)

Your are mistaking it with the other, smaller Noctigon lights. The M43 is the big one with boost driver. It regulates perfectly in all modes. In the turbo mode each of the 12 LEDs is driven with 2A when the light is cool.

The_Driver, by the time I shot my above reply I was in a deeply tipsy state, and guess that is the reason somehow I understood you were sort of complaining about low output with LH351Ds in an M43. Nothing more, nothing else.

Cheers :-)

I didn’t know there was a version of the M43 with the 219B. But do remember that most manufacturers do not measure their lights in an ANSI calibrated lumen sphere. I measure my lights in the TA lumen sphere with adjusted with Maukka’s ANSI calibration lights. The majority of lights produce much less lumens than the manufacturer’s ratings.

Actually they do. At least 95% of them, most of them state it. Also, a sphere is not calibrated according to ANSI. The ANSI FL1 standard describes how a flashlight is to be measured using a calibrated sphere.

The only upper range manufacturer where I have heard of problems is Armytek.

The 219B-V1 variant of the light was only available for the first year or so and was dimmer than all the others while costing more. It also gets hotter more quickly. But back then it was the brightest high-cri flashlight available.

Well yes, the Lumen value should be a bit higher. That would be extremely inefficient for 12 4mm^2 LEDs at 2A each.

I highly doubt the M43 with 219B can produce 4400 lumens. The readings I posted earlier for all three of my M43s were measured with the TA lumen sphere, with reduction factor applied to match the Maukka calibration lights. You can read all about it in the TA lumen sphere thread and Maukka’s calibration lights thread.

This store has the lee filters on sale for the next few days, I just ordered an 804, 803 and 802

http://www.ebaystores.com/Knight-Sound-and-Lighting/\_i.html?\_nkw=lee&submit=Search&\_sid=181469459

840 or 804?

Opps 804

Thought so - Ordered the same - best price I have seen with $5.00 shipping.

Thanks, TA

Yep, same here which is why I ordered 3 sheets, the shipping remains $5 even if you order multiples which is nice.

This test from djozz proves that it’s possible.

The 4000K 219B-V1 R9050 does 470lm at 2A (the 5000K variant in the light should be the same or brighter). 12 of them 5640 led lm. After you subtract the usual transmission losses you get around 4600 otf lumen. They state 4400. Seems realistic.

This is much dimmer than some of the other M43 variants, some do 7000-8000lm.

I remember maukka test of some Zebra that showed way lower performance than stated by the manufacturer.

Same here. Zebralights and Armyteks are usually lower than manufacturer’s ratings if tested using ANSI calibrated standards. Fenix, Olight, Acebeam, and Thrunite numbers are usually closer to ANSI lumens.

Those are Djozz lumens. I’m not sure how he calibrated his sphere. Even the famous TA emitter tests show lumens much higher than ANSI levels because it was based off of his previous calibration, which is over 30% too high and most DIY lumen spheres are similarly high. Now all of TA’s lumen spheres sold are based on Maukka’s $10k+ certified lumen sphere calibration.