Emisar D1S Oslon Black flat mod 340k+cd

Low current battery like an NCR18650B, replacing the driver, or perhaps, just remove the high current BeCu springs and replace them with steel ones.

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.

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

Hmm
Are you using standard center ring or customized?

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.

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

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 :heart_eyes:

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.

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

Nice and tight, a true pocket thrower !

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.

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.

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?

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?

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?

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.

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.

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.

So led4power@led4power.com has this:

https://led4power.com/product/new-osram-kw-cslnm1-tg-1mm2-throw-king-16mm-xp-dtp-mcpcb/

Easy to mod and it will throw like hell!