I checked mouser and there are a lot of DC-DC converters that will take ~12v and bring it down to 3-4 for the LED.
They are all constant voltage though, not cc.
I don’t think this is an issue though, as long as the LED is cooled properly you can set it to constant voltage and the current won’t change.
They also have protection for overcurrent, so all you need to do is buy one that does 40A or 50A or whatever you want and it won’t exceed that value.
2.65mcd is possible
if enderman thinks its remotely possible, then it is
the gt is twice the light the 42 is
its at 1.3 mcd out of the box, under driven, without perfect tuning, and reflector is twice the surface area
should be very possible.
enderman knows more about this stuff in his sleep, than most here will know awake, in their lifetime.
i wouldnt question his judgement.
I calculated 2.3 not 2.65 btw 
ill take it.
when do you want me to send you my 2- gt’s?
and how quick will you have them back ? 
lol ! :money_mouth_face:
lol
That’s more of a job for someone like vinh who is a lot more experienced with flashlight modding.
I’m sure once he gets that 20A+ driver he’s working on finished he would be glad to mod the GT for you.
I don’t really do flashlight mods, more scratch builds 
I do have plans to mod my R40 some day, I think I can get over 500kcd out of that tiny head!
Not enough time or money atm though.
Some nice beamshots from Wolfdog1226 can be found here.
Acebeam K60 with XHP70 in DD:
TN42 with CFT-90 at 18A:
Notice how the spill of the TN42 is not darker than the spill of the K60.
I’m dreaming about putting CFT-90 together with Texas Avenger driver in my MF-02.
Would that driver be OK choice for this LED? Buck would be better, but I reckon that with as low Vf as CFT-90 has it should be possible to get 90-95% of output (with fresh batteries, then dropping). Considering that TA is available and powerful-enough-buck, even of it existed, would cost significantly more it looks fair to me…
I remember seeing problems with 7135s blowing in high-current XHP70.2 builds, would that be a problem here too?
Is TA resistance low enough to enable 30-35A currents?
I would be willing to ship one of mine for this mod, Enderman.
If you are willing as well. :+1:
Haha thanks but no, I don’t do mods for people, mostly because of time restrictions.
I’m way too busy in university.
There are people like Vinh or others here on BLF that would be willing to do it for you and would probably do a much better job than me at it
Taking the light apart without damaging it is also very hard, I would only take that risk with my own stuff, not other people’s.
Did anybody say, let’s built a new GT with this new LED? I’d be willing to start the research on doing something big with this LED. By research, I mean, donating money, so the guys with the talent and brains can do the research, and design for us. Is anybody else interested in doing a project?
If is true what guys say, about needing active cooling, I think we should look into that. How about building a 140mm reflector with this LED?
Vinh is modding several GTs with this LED.
They will likely be between $500-1000 each.
I don’t like working on other peoples things myself. I figured your response on the lines of what you mention, based on some of your comments on other threads.
Matter of fact, I noted your response prior to mine.
Maybe Vinh will come up with a nice recipe for the GT. If he does, I may get interested enough to follow through by sending him one of mine.
That last picture made me chubby. Any chance This won’t require me getting a second job to pay for it?
I would be in for research assistance.
The first one costs like $10,000
The second one I think you can find for under $1000 if you look hard enough, but only on sites like aliexpress or alibaba and stuff like that
https://www.aliexpress.com/item/DuanFei-Light-DunFly-Free-shipping-Sky-beam-outdoor-tracker-5000w-sky-search-light-for-top-building/32836220571.html?spm=2114.search0104.3.25.46028cb1ctYb7&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10344_10130_10068_10547_10342_10343_10340_10548_10341_10084_10083_10618_10139_10307_10313_10059_10534_100031_10103_441_10624_442_10623_10622_10621_10620_10142,searchweb201603_38,ppcSwitch_7&algo_expid=d699d7e8-739b-410a-b35c-8f59b4add770-4&algo_pvid=d699d7e8-739b-410a-b35c-8f59b4add770&transAbTest=ae803_5&priceBeautifyAB=0
Ok I’m seriously considering putting this LED in the Syniosbeam (after I do testing and have fun with the synios LEDs)
The 85% collection of the reflector would mean over 4k lumens in the spot and more than 10Mcd
The main reason I would do this is to have a really bright and visible beam, kinda like those pictures from earlier.
The compromise is less throw and a less-collimated beam.
I talked to lexel and he would be able to build a custom 30-40A driver for me for only a couple hundred dollars, so this might be a good mod some time in the next few months.
I still have to finish the syniosbeam though first, haha
The_driver, a few weeks ago you showed me a link to a 30 or 40A CC driver, I can’t find the post, can you link it again please?
Thanks
Are you referring to this post:
The SYNIOSBEAM - CFT90 recoil thrower - #13 by The_Driver1 ?
It is in your own Syniosbeam thread .
There it is!
Thanks, for some reason I couldn’t find it xD
Enderman, Do you have any idea how many kcd could be achieved in an Olight SR52UT? If you think that 500kcd is possible in the R40, I would think that the Olight should do much better in throw and heat management.
Manker u21 do 465kcd / 800 lumen with oslon led… i am very impress with it… of course i bought it from skylumen…