Yesterday I finally assembled my (DongDongHai)DDH-M4B with an optional dual 21700 tube.
With 2x Tenpower 50XG I’m getting nearly 24,000 lumens at Power On:
Note: I used a 30mm driver with a 30mm to 32mm adapter ring. I had to make some modifications to make it work. I highly suggest using a 32mm/2mm thick driver, as the manufacturer recommends.
That is awesome. What driver did you use?
That looks great!
It uses a remote thermistor that gets mounted to the MCPCB for temperature control.
I’m not utilizing it on this build but it also has a fan controller that can turn on/off a fan based on Temperature and/or Ramp Level.
So much DDH lately… The DDH host/driver community seems like such an awesome modding ecosystem on par with Convoy lights, that it is a shame there is no simple distributor to US/EU/etc. like Convoy has. I guess it’s a supply and demand issue, but even if DDH ended up on AliExpress, that would still be a step up in terms of exporting it to the rest of the world… Navigating Taobao is straight-up torture. 
I eyeballed this host to put one of the NBD110 4500k in, but for now went with the D5F… Still waiting on a shipment of drivers and LEDs. 
This is my second DDH, I have a 3rd on the way!
The D5F looks really nice but I only own 1 26650 battery.
I have more QB26800s stashed away than I care to admit. I look for excuses to put them in things.
The D5F I ordered already came with the 26800 extension on it. I didn’t have to order a separate one.
really reminds me of the XFL12K i put into an M21J with a bypassed driver. thing just about blinded me when i turned it on pointed at a white wall.
yours looks a lot more elegantly made.
The shape of the emitter somewhat reminds me of Minecraft 
very nice Dong 
Thanks! It’s currently the brightest light I own.
My GT94 doesn’t break 20,000 on my lumen tube.
Another badass build 
I couldn’t find a way for the payment so gave up on the Idea of building one myself.
TaoBao only ships within China so I use SuperBuy as my forwarder.
I’ve placed 6 SuperBuy orders so far and haven’t had any issues.
Superbuy is where the headache started
Would love more details on the driver! What FETs and micro are you using?
I might have to pick one of these fabled DDHs up.
Is that a 3x parallel direct drive FET ???
I’m using IQDH29NE2LM5CGSCATMA1 Source Down FETs with a gate driver and a ATTiny T1616MCU.
The FETs have very low resistance:
I originally built this driver for a SFY55.
For this build only 1 of the 3 FETs is populated but with Tenpower 50XG it was pulling too much current for the SFP55(6v):
From the manufacturer:
So I’m currently using 2x Molicel P42A.
Yes, but for this build I’m only using 1 FET(see above post).
