Emisar D1S Oslon Black flat mod 340k+cd

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ZozzV6
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Black flats arriver few days ago. I putted in an L2 and a GT mini. Not tried them just picked the first. In the GT mini I got strange ring beam and only 160 kcd.
Replaced the reflector with the Emisar D1S (perfect fit) and I got 214 kcd. Still not happy with results completely. These numbers are measured with GA cells. With HG2 it was worse. The L2 is worse then old XP-G2 S4 2B dedomed.

Niko
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i think your led not focused properly

ZozzV6
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Niko wrote:
i think your led not focused properly

Like that? I think it is more like can’t set perfect current or I lost the black flat lottery

Niko
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Hmm
Are you using standard center ring or customized?

The_Driver
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You need to check the focus outside on an object that is far away. It’s a lot of work to get if perfect. The smaller the led and the larger the reflector, the more difficult it is.

SKV89
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Skylumen discontinued the Oslon version of the D1S and GTMini because it takes too much work to tune the beam for the Oslon.

-X3-
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I just put a Black Flat in my D1S as well… amazing !
I can’t measure the intensity accurately but according to the ceiling bounce app “calibrated” with my stock M3XS, well I hit a mere 350 kCd…
Even if I’m 20% wrong it’s still really impressive and the beam is really tight !
Oh, and BTW I also put one in the said M3XS… 450+ kCd Love

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SKV89
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X3 wrote:
I just put a Black Flat in my D1S as well… amazing ! I can’t measure the intensity accurately but according to the ceiling bounce app “calibrated” with my stock M3XS, well I hit a mere 350 kCd… Even if I’m 20% wrong it’s still really impressive and the beam is really tight ! Oh, and BTW I also put one in the said M3XS… 450+ kCd Love

Nice!

But I don’t get how does ceiling bounce work for throw measurements.

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SKV89 wrote:
X3 wrote:
I just put a Black Flat in my D1S as well… amazing ! I can’t measure the intensity accurately but according to the ceiling bounce app “calibrated” with my stock M3XS, well I hit a mere 350 kCd… Even if I’m 20% wrong it’s still really impressive and the beam is really tight ! Oh, and BTW I also put one in the said M3XS… 450+ kCd Love

Nice!

But I don’t get how does ceiling bounce work for throw measurements.


The luxmeter app available for Android is called “ceilingbounce” but you can also evaluate throw by stating the distance between the sensor and your flashlight. It does the calculation on its own and gives you kCd approximation.

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-X3-
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Throw a Black Flat in my D1… around 90kCd now :

Nice and tight, a true pocket thrower !

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SKV89 wrote:
How do you limit the amps to the black flat on the D1S? Do you just use a low current battery or do you have to replace the driver?

You could use the D4 Nichia 219C firmware, it limits the maximum output at 80% PWM. If you need to go even lower than this, you need to alter the ramping table further down. It’s a nice and clean reversible software solution.

Edit: Anduril that is.

SKV89
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Wow that’s impressive for the small size! Maybe if you use the new OSRAM KW CSLNM1.TG, you can get 110kcd! That’ll makes it a true pocket thrower.

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I just finished my GT mini with D1S reflector yesterday and I can’t go above 255,5 kcd with the OSRAM KW CSLNM1.TG. I tuned the focus for hours. Measuring every tiny bit of change. With Black flat it was 213 kcd. I just can’t understand how can it be 340 kcd. And 300 with C8? How?

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It’s better to calculate beforehand (using the Luminance, the reflector diameter and accounting for losses) instead of believing other people’s measurements which you can never trust 100%. How accurate are your own measurements?

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My GT mini with dedomed XP-G2 S4 2B does 235 kcd, so there should be some improvement with this new led, unless the small led is so finicky about reflector perfection that the bigger die of the XP-G2 is needed to smooth out the artifacts.

I’m sure you monitored that but for my peace of mind: you did measure that the current did not exceed 6-ish amps?

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I’m using Sanyo GA cells to not reach 6A. Even tried GA cells at 4, 3.9, 3.7V but not much difference. It was between 800-892 lumens. I measured around 300 lights. Around 200 in my tables. For cd reading I read distances from luxmeter with laser distance meter. I don’t know why is the big difference.

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It’s hard to compare different people’s measurements, there will always be variability between them at play. What’s noteworthy is that you got a 15-20% improvement in performance with the White Flat over the Black Flat.

ZozzV6
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Ok yesterday was a big rain and I took measurements right after that. So Air has high humidity but not that high to make 90 kcd difference.
The black flat was not perfectly focused. The white flat I think is in the best I can get because I raised the centering ring with kapton tape layers and took measurement after each layer until it started dropping in kcd. I done the same with my GT and I got it with 903 kcd and managed to bump to 1174 kcd with that method.
Or maybe my luxmeter reads low compared to others.

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Djozz showed in his luxmeters tests how huge variation between various luxmeters can be, so all BLF numbers are questionable, at least until we (BLF) find or make "BLF luxmeter". Only then comparisons would make sense. How hard is to accurately measure light can be seen from tolerance given by LED manufacturers - 6-7% is common number, and they have multi-million $/€ equipment.

 

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^Agree. BTW I will buy Maukka’s calibration lights and correct all my numbers in my tables according to that.

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In what distance did you measure the light? 1m is definitely too close with such a small led and such a large reflector.

ZozzV6
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The_Driver wrote:
In what distance did you measure the light? 1m is definitely too close with such a small led and such a large reflector.

1, 5, 10, 15, 20, 25m
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You can’t catch Zozz on not being thorough Big Smile

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For the record, I always said that my numbers might be WAY off…
That said, the Black Flat in a D1 IS impressive once it’s focused properly Smile

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For the record, I always said that my numbers might be WAY off…
That said, the Black Flat in a D1 IS impressive once it’s focused properly Smile
My M3XS turned into a light saber with it too !

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People want to talk about humidity having such a big impact, and I’m sure there is some impact as the air is so much more dense, but I got a 1.41Mcd reading at 50M with the new MaxToch XSword and it only makes 370 lumens… it was actually raining lightly at the time!

Color of tint can actually impact the throw number, as can humidity. Or the meter. Or the strength of the cell in the meter.

The only constant is the variables. Wink

I have a Black Flat in one of my D1S’s and don’t particularly like it, will be going back to the XP-L HI probably today.

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ZozzV6 wrote:
The_Driver wrote:
In what distance did you measure the light? 1m is definitely too close with such a small led and such a large reflector.
1, 5, 10, 15, 20, 25m

ZozzV6

Please try this… Take those wet tissues. Clean that plastic white lux sensor plastic (first cleaning move). Wipe with clean microfiber cloth or dry tissue(second cleaning move). After that try to measure again. You could be very surprised…

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led4power wrote:

Djozz showed in his luxmeters tests how huge variation between various luxmeters can be, so all BLF numbers are questionable, at least until we (BLF) find or make “BLF luxmeter”. Only then comparisons would make sense. How hard is to accurately measure light can be seen from tolerance given by LED manufacturers – 6-7% is common number, and they have multi-million $/€ equipment.


 

I am in for BLF luxmeter special edition… They can be calibrated by you for example Thumbs Up

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Nice!! That’s an intense beam.

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