(Cancelled)D1S+, CSLNM1.TG LED, 850lm, 320kcd

thermal issues with about 3W on the board no
I plan to reflow additional copper pieces on both sides to spread heat, bottom would conduct directly in the tube

but best would be a combined MCPCB with FET like L4P has

Don't recall what the D1S looks like inside, but Hank's D4's are extremely tight for driver height - ugh, but you are probably aware of that already. I'm not a fan - I'd rather add 1-2 mm to the pill size and overall length. More slop space, little more metal in critical heat area.

I am talking only about 0.5mm copper sheet or so, that would minimal increase the gap between tube rim and head,
but could be simply eliminated by shortening the tube on lathe, but MCPCB variant is best

Lexel, such driver would be great for many lights even if it required buying MCPCBs from Led4Power.
That because:

  • Led4Power drivers don’t support e-switch (though that’s likely to change rather sooner than later)
  • Led4Power drivers don’t allow the great open source UIs that BLFers made (and that’s unlikely to change).

Received Flat White LED with centre ring so I put it together with D1S stock driver. Center ring helps but it doesn’t fully focus the beam (i.e. hotspot is not perfectly round).

Becareful with center ring as the LED silicon is fragile. Mine got chip at the corner but still working ok :stuck_out_tongue:

Reflector size (Head to head): D1S have slighly larger reflector so more advantage in throw

Hot spot comparison from left to right
Convoy Flat Black, D1S White Flat , Convoy XP-L HI

Lux reading for hotspot at 8m distance
Convoy Flat Black = 3,392 lux
D1S White Flat = 2,897 lux
Convoy XPL-HI = 1690 lux

Clearly XPL- HI is no match with Osram LED

It’s strange that Flat Black out perform D1S white Flat . Maybe i need to focus the beam again on weekend.

simple answer is that its getting too much current and dropping in brightness again because of Auger recombination
White flat should run at 4-4.5A in a light not more

I am sure it will blast the C8 at 1A where the AMCs are fully regulating on both lights

What cell did you use in the D1S?

i used Samsung 30Q

Hey Lexel i actually ramped down D1S to match the tint with Convoy Flat Black. Im aware it take around 4.5 to 5A as ultimate performance and deteriorates as more current go above.

FET driver can get up to 8A and D1S on turbo it get abit blue tint and i would say around 7000k.

Dont know what other thinks but i like Flat Black more as it seems more robust and giving me better result. Im waiting for parts arrive then i will mod another Convoy 8+ with linear driver LD25 … White Flat vs Flat Black.

you used a 30Q on the white flat and it works? then why is everyone saying you need a new driver? i’m confused

The battery (30Q) has nothing to do with the driver, in case of the D1S it's an FET driver. The FET driver will pull all amperage it can get from the battery, i.e. using a high drain cell like Samsung 30Q it will draw far more than 4.0 - 4.5A. The white flat has its peak output at 4.0 - 4.5A. Overdriving it will not necessarily kill it but the output will be lower with the additional side effect of lots of generated heat. What you need for the CSLNM1.TG ("White Flat 1mm²") is a current-regulated driver that limits the current to max. 4.5A. So far, the best driver that works out-of-the-box is Neven's LD-A4 driver.

https://led4power.com/product/ld-a4-2-12amp-17mm-constant-current-led-flashlight-driver/

You still drive the LED at 8A just pulsed, temerature is OK because it averages, but the Auger recombination depends on current and this mainly let the output drop
also focus may be off

So to be fool proof…we would need a d1s, a black or white flat led and that current adjustable driver, and we would have a 320k lux light like Hank almost built….?
And some soldering skills

Edit. I understand the stock driver could be used and just use a low amp battery or smaller guage wires…I just want to be as safe as I can

I’m thinking the same. For my single emitter throwers, I have flat black. For my multiple emitters, flat white gave better results.
Anyways, looking forward to the matchup. Keep us posted.

Multi Flat White emitters, how many and were you using a reflector or an optic?

I made a triple FW with a sanded/polished optic, pulling 15amps 2100lms. didn’t like the the triple optic one bit, thinking of using them in a triple UTORCH C8F reflector next….

says driver is 17mm, d1s uses 20mm :frowning:

That’s not a problem:
http://kaidomain.com/Flashlight-DIY-and-Tools/Misc-Parts/S025087-KT02-17mm-to-20mm-Copper-Ring-Adapter-2pcs?limit=100
The problem is that as of now l4p driver does not support e-switch. Your Emisar will turn to a twisty.

Ok, guys, I have a few White Flats on the way from Hank… tell me what I have to watch out for. Isolate the MCPCB from ground, limit the emitter to around 4.5A, anything else I should watch for?

I have a D01 Courui that I fitted with a Ledil Seanna quite a while back. It makes over a mile throw with an XP-L HI… thinking of using this 3P 18650 with the White Flat for mega downrange pencil beam. Any thoughts?

Don't think the white flats required the isolation, black flats do. That sounds like a great host to test one out in!

Yeah, the white flats have a neutral thermal pad, IIRC.

Yes, regulated to under 5A, and focus focus focus. The centering piece that Hank has made will help with that.