I was recalling that the L6 makes around 4000 lumens with a ~5A draw, so I did simple math to get 30W per emitter. 5A x 6V = 30W in the L6. Multiply that times 12 and it’d be some 360W. I’m probably overlooking something as I usually do.
53,000 lumens divided by 12 emitters would require each emitter to make 4416 lumens, or effectively 12 Convoy L6’s running in a single head.
@DB Custom, don’t forget your 20k lumen load was spread out across 3 emitters, and not 12. XHP70.2s are very efficient below a 5000 lumen load.
Also, do you have a thread of you making that 21700 light? I would love to see it.
XHP-70 emitters make more fuss about being pushed hard. 
Times 12. Still, it’s not all about the heat, power consumption is problematic for the limited power supply. The number of places that require compromise is the real issue.
Even with 9V MTG2 emitters, 4 of them make a lot of heat. I have a TrustFire TR J-20 that uses 3 32650’s to power 4 9V MT-G2’s in parallel and again, in spite of a ludicrous amount of additional heat sink the light does get hot pretty fast. And it “only” makes around 14,000 lumens. This light is monstrous, with very deep fins and a LOT of them. Insufficient. Big power is just difficult to do on battery packs that we can hand hold. We need to use the flashlight to house the cooling system and a belt mounted battery pack to supply the power, this would remove the pack from the heat of the operating light and allow for much higher efficiency. Keeping the cells so close to the heat source is just folly, when maximum lumens is the game.
My big light, or the triple 70.2, is my 5th scratch built light… hence DBC-05. I started this literally the day before I blew out 2 discs in my neck, finished it (as a different plan) after neck surgery. It was satisfying coming back and achieving the results I saw. I don’t take pics while on the lathe, sorry. I’m not a machinist, I’m a photographer… I do NOT want my equipment out in the shop and I DO want to keep all my fingers…
Blue, remember that Imalent is using the older XHP-70 in the big light.
Ok wut. Why? XHP 70.2 are quite a bit better than XHP70s, except for tint shift obviously.
Perhaps they have a problem with their source of cheap XHP70.2s not passing quality testing at such high power levels, or maybe they want higher profit margins by using old XHP70s left by streelight/big light manufacturers since they are way cheaper.
Martin says that he was told the 70.2 have some issues so they went with the more reliable 70 series. I am not sure what they were referring to but that’s what they told him. Obviously, it’s not going to be easy to push the 70.2 to challenging levels when using 12 of them, and at under 5,000 lumens per emitter there just isn’t a problem. The use of 70.2’s in this light would yield even more than what they’ve tested, if indeed the 70’s do 53,000 then the 70.2’s would do more than that without changing anything else.
Now, are we going to pay $600 for a flashlight then buy 12 new emitters at over $12 each to upgrade it? Well, somebody here might. Somebody with deeper pockets than mine…
Edit: Several of us here have pushed the 70.2 to over 9000 lumens in lights like the L6, maybe even in the GT…
:D
LOL! That’s giggleworthy for SURE!
I can see the bones in my hand! :person_facepalming:
Kawi, order me one when you get yours. 
A tangent question on XHP70 vs XHP70.2. have any of you guys that have modded with XHP70.2 experienced the emitters failing? I have read of several cases with the DX80 where 2 of the 4 dies lose connection and go dark. Similar to the common problem with XHP50.2. it can be easy to miss because 2 of the 4 dies would still be putting out a lot of light. You would need to look at it with eclipse or welding glasses to spot the dark dies.
that's the reason why they used the xhp70 .
70.2 IMHO It’s all in the (bad) re-flow too much heat during the flow, or not enough solder with the ones I maimed/killed, never killed a 70 unless I was doing a total clean de-dome breaking bond wires. The 70 is a really tough emitter compared to the 70.2, but what do I know…it’s just from my limited non scientific experiences….
I sent the pic and link to this thread to some of my friends. I personally will not be getting one, but maybe they or some one I know will, so I might have a chance of handling one or two, Pat/Ross are you lurking…
It’s a crazy beast, hope it works out well for Imalent and their customers…… :+1:
Well dang, am I gonna have to build something in an attempt to see those numbers? I have 50 Samsung LH351D’s…
@DBCustom, perhaps these MCPCBs could help you build something special in the 7070 emitter size with the LH351Ds:
So, you’re thinking that if I bought 12 of those and left them attached and flowed 48 Samsung’s for a 48 emitter mule that I might see some serious great wall of lumens output? Probably pushed by a 4 parallel set of 21700 30T’s?
Edit: I have multiple 15 count sheets of SinkPAD’s that the SST-40 will fit on. Wonder what 45 of those would produce with a bank of, say, 8 parallel 30T’s?
1. Hmmm. With nice high efficient optics from say UCL, you could perhaps reach 50k lumens with 48 of these emitters
And yes, you could push 500W out of these 4 cell of Samsung 30Ts. I just wonder how you could actually reach that amount of power without melting copper on your way to the emitters if you take the 3V variant :smiling_imp:
Seriously though, it could be done. I would just recommend to take the 12V MCPCBs to lower current as much as possible.
2. Yes it could be done. However, you would need say… over 130A of total current. How would you do this?
Multiple FET drivers to drive banks of parallel emitters from the same power source. I mean, if I was going to… it’d effectively be like combining multiple lights into a single host. Like 4 Noctigon M43’s into one unit. 
But of course, they are doing this here in a single large head with a cooling fan and nice charging set-up, so perhaps Imalent is onto something. I personally find the 9x XHP-35 very intriguing. If I were to buy one of these 3 it would be this one.
R90C vs MS12
R90C
MS12