for DD the current with full cell needs to be below 4.5A, so some older cells like NCR18650B with PCB may do only 4.5A when full
also you may try to solder simply a 1W 47mOhms resistor on each contact on the MCPCB to get the current limited
you need to check with a clamp meter
That quote says “regulated buck driver”…
IDK how they managed to get that into the manual though lol.
The GT mini Manual mostly copied from the GT manual and Lumintop made a mistake that they written buck driver. It is not a buck driver. it is a fet+7135.
Finally got my few white flat (CSLNM1.TG) builds sorted. All now using L4P LD-A4 drivers set to 5.5a
Measurements at 20’
Convoy L2 with single liitokala black: 407,659 candela, 720 startup lumens
Cometa with liitokala black: 333,708 candela, 780 startup lumens (zoomed in for sphere)
Convoy C8 with 30Q: 219,623, 720 startup lumens
Had to sand the centering rings down to adjust focus on the c8 and l2 a little. I’m still not 100% happy with it, but I think it is nearly right.
Very NICE! :+1:
I thought there was a problem with that driver getting to hot?
What did you use to make the 17mm drivers larger?
Maybe the store bought brass adapters…or make your own out of copper crush washers…like I do?
Yup. Adapters from kaidomain, sanded thinner to fit. They’re a little tall in stock form.
I grabbed some 20s and 22s.
I’d love to do an l6 or mod my gt with this emitter.
Any other drivers out there that’ll do narsil eswitch and limit current?
Can you measure the temp of the driver after 2 mins?
Fyi Hank (intl-outdoor.com) posted some of the 1mm leds bare and on stars. You can add optional gasket with it also.
I even emailed Hank and ordered extra gaskets without led or pcb.
Someone knows a source for a white flat on a 26mm board?
MCPCB from maxtoch
And LED from Led4power.
Soldering individual.
No, you would need to do it yourself.
Did an intensity test for the CSLNM1.TG
LED obtained from Led4Power on a 20mm copper MCPCB.
LED heatsinked on a Coolermaster GeminII S CPU cooler with a 120mm corsair SP fan at full speed.
Thermal Grizzly Conductonaut liquid metal used between the MCPCB and heatsink.
MCPCB tightened down with two screws.
Luxmeter is an LX1330B.
Distance from LED to luxmeter measured with a UT393B laser meter at 1m +/- 0.01
Stray light from LED blocked using Edmund Optics flock paper to avoid reflections.
Current was monitored with a UT210E clamp meter.
Power supply used is a DPS5020, also used for the voltage readings.
Die area used for calculations is from datasheet, 1.03mm x 1.03mm
Results:
Very impressive LED under extreme cooling.
Peak reached at ~5.6A, would not recommend going this high in a flashlight host.
Should be close to 700cd/mm^2 with an RLT collar, if I feel like it I might redo the test with a collar on it.
Nice test… I have put that test in a first post.
Mine is running fine in FET DD rig setup. Nothing died yet. Generic flashlight host which goes from 5.8-4A depends on low current battery.
So I don’t think it will die even if it is not super cooled like in your test… But time will tell. Members will share experiences 
Yeah it won’t die, you can see from djozz’s test that it can handle a lot of current (probably thanks to no bond wires)
It just heats up too much and output starts dropping.
Graph and numbers confirm to me it’s not really worth it to go beyond 4.5 Amperes.
Even 4.0 Amperes seems like a high enough maximum current.
Thanks for testing.
Yeah in a normal flashlight the peak will be at around 4A, more like djozz’s test.
Even at 3A you get msot of the performance.
This would be a great LED to swap into all those flashlights that have a 3A driver usually driving an XP-L HI at 1000lm.
I really wanted to know how far I could push it 
Should I try make a 7Mcd optofire?
You’re welcome!