I don’t believe that has been done before, but I see no reason it couldn’t be done if a suitable optic is found.
Kaidomain sells some 50mm triple optics which are the biggest I have found. An XHP70 dome would likely fit in them. I happened to order one today to experiment with a triple D-cell maglite, so I will report back in a few weeks when it arrives.
I know something about it. 3 lbs of copper under 3 50.2’s still allows it to get hot pretty fast. 12,000 lumens does that. Khatod makes an optic that will fit over the XHP-50.2, so if you can get the mcpcb under them you’ll be seeing 10,000 lumens and then some from a C8 using a pair of dark purple Efest 18350’s. The Aspire cells will last a bit longer but not produce quite the lumens. An extension tube with 18650’s will do something like 14,000 lumens, and this is just the 50.2. But of course, heat is a big factor and for most people the weight is also more than they care to deal with.
Going big brings in heat problems like a big dog, so without active cooling even several pounds of copper isn’t really sufficient.
What khatod optic did you use in that C8? I was going to do my triple 50.2 C8 with a Ledil CUTE-3-SS and shaved domes, but if I can avoid shaving the dome that’s even better.
I didn’t make a C8, yet, but I made an X6. Still a 35mm optic, will have to find the number on it again…. I had that one here for a few years before using it.
Pretty fun, 10,000 lumens in a X6! 
Not all that practical, even with a taller copper sink (the Khatod is shorter than the CUTE-3)
Edit: the part number is Khatod PL605A06
i mean it wouldn’t have to be on direct drive all the time right (I know that’s a tough concept hahahah)
but maybe it could do 8k lumens for an hour and still be… able to be held by hand.
Lumens, big ones, and run times…. difficult to combine the two. Cells die, takes a lot of current to get the output. I tested my TR-J20 with 4 of the 9V MT-G2 emitters on level 4 of 7, looking to see how long it would stay above 4,000 lumens. I think it ran like 36 minutes, pulling down the 3 big 6000mAh 32650’s even at half what you’re asking. I’ve got it heat sinked in a big way, so heat was there but not quite a problem. More, like the next level, and it probably would have gotten too hot to touch.
RMM, do you know if your quad MCPCB fits the D4 and the D4 optic? If so, I’d like to list it as an upgrade option.
You’d get a better beam profile from Richards MCPCB if it fits, due to the skewed footprints. 
Yes, it does. The D4 optic is a normal Carclo 10621 lens, unlike a lot of the other Chinese quads.
Sorry, no plans for a triple 32mm XM MCPCB. To make it cost efficient, you really need to produce hundreds---if not a thousand. I've only sold a few dozen in a year and a half.
Noticed that HaikeLite has made mention of your company as U.S.A. dealer and wondering how soon you’ll have any stock and any idea of what models.
As soon as the lights arrive. They were supposedly sent 11 days ago, but I do not believe that since DHL never takes that long.
Initial lights will be the MT01 and MT02.
From looking at the specs, the noctigon board is 2mm in thickness and your board is 1.6mm. I’m worried that will also change the beam profile with the optics farther away from the emitters.
If you spent few more minutes and check carclo specs you will see that legs pins height is 1.5mm.
Not surprised sadly, I have had a lot of run around with both Alvin and Lee, and not the chipmunks, actual names they used with me going back to their first lights Nov. 2016, MT03 and MT07, still have those originals, what a mess they were.
Edit: Whoops, saying a bit to much, cut out my commentary, have had the same experiences with Haike, it’s 3 days from HK DHL.
thanks for the info! you saved me 50 seconds of my life! LOL
Thanks! That should make it an easy upgrade. 
The thicker MCPCB probably won’t be an issue. I haven’t tried it, but it seems like the worst case would be maybe using a thinner O-ring or not tightening the bezel quite as far.
Richard, I received my D4 and a bunch of other stuff and I wanted to thank you for the way you pack the mailer bags. My deep pocket clips were secured and taped to a piece of foam so they arrived intact and without scratching everything else all to hell. I also appreciated the tape on the 18650 cells. Wouldn’t like them to wiggle loose in transit! It makes me happy to buy from someone who cares and goes the extra mile. Thanks! :+1:
About my D4, yeah, it isn’t set up with the new UI, but after playing with it for a bit, I really like it. I added the deep pocket clip and can’t wait to take the pooches out for a short walk tonight. I’ve just got to make sure I don’t accidentally blind them! :cry:
The skunk that’s been hanging around lately, well that’s another story… :smiling_imp:
Thanks PBWilson!
Also, for those of you who were interested in the HaikeLite MT01/MT02, we have them in stock now. They are pretty beefy lights---definitely not thin machining on these. Drivers are good quality and have a simple UI.
Nice looking! Want, can’t have…