2.4025Mcd
That’s holding the condenser lens out in front of the CFT-90, manually, open air.
That would indicate, roughly, 3100M throw. And this tested at a mere 5M.
Again it’s rough, but around 1.93 miles throw.
Oh, it’s also using the 32650 cell not freshly charged… a fresh 30T would do even better.
Okay, now I’m really anxious for you to make a real light out of it, and test it at a much longer distance, for better accuracy. :partying_face:
You’re killing me Dale. You’ve entered Enderman territory, but you’re still doing it the DB Custom way: OTF lumens or bust!
I await build progress, finished pics, and finished measurements, preferably at around 20m 
Oh yeah I like very much
Lumitop is making an SBT90.2 version. SBT-90.2 in the BLFGT (FACTORY) Fom Lumintop!! - #2 by M4D_M4X
On the subject of the SBT-90.2, it seems Astrolux will offer it in the FT03.
Of course, THIS thread is about the CFT-90 which outperforms the 90.2.
I know this is really expensive but how much better is it than the SBT90.2?
The CFT can handle a lot (a LOT) more amps, pretty easily makes a thousand+ more lumens.
It doesn’t look like that to me.
CFT-90 maxes out doing 5750 lm at 45A and does 5000 lm at 25A:
SBT 90.2 does 5000 lm OTF in a host, at ~27-28A which is about 5500 LED lm.
From these numbers, SBT90.2 would actually be better.
There is quite a lot of variability in these tests and I keep that as uncertain until I see further data but it doesn’t seem like CFT-90 is so much better.
I have the CFT in a light running off a single 32650 at 19A making right at 5000 lumens out the front. FET+1 driver.
My memory biting me in the butt again…
I looked back through notes and messages to a friend and after I put the Tofty switch in my 95mm scratch build with the CFT-90 it’s doing 5010 lumens at over 25.8A tail measurement. A 5M test showed 1.13Mcd for 2126.03M (1.32 miles). This was Sept 16, 2019.
Again it’s an FET+1 driver with Bistro that I built for it, running off a single Sanyo 30T 21700 cell. I DO use a 32650 in this light, but I tested it with the 21700 for max results to get an idea of it’s potential.
Edit: A pic of the CFT-90 in DBC-05 blasting fog just before sunrise…
So…within error margin of that SBT90.2.
The Luminus data sheets show the CFT much more efficient, probably because of the thick copper base it’s built on. At any rate, the CFT makes more output lumens at the same amperage and of course at the time I got the CFT the 90.2 wasn’t available to buy. I am hearing more about the 90.2 now and a few folks are having them specially shipped at a fairly substantial cost but I still haven’t located any for purchase. Probably won’t be able to resist if/when I find some. 
Unfortunately I can’t do a comparative test as the light my CFT is in is a one-off with a prototype reflector that was not put into production so I can’t duplicate the light build. Still, it will be interesting and I do have an Sup-Beam K50 that would house it nicely and has a really good reflector if not quite so large. I may also consider modifying my TN-42 for a 90.2 if I can find one.
Edit: The new Noctigon K1 is on the way to me and should be arriving soon, while it seems outstanding with the 1x1 White Flat it may be a great host for the 90.2, remains to be seen. 
SBT-90.2 is not present on Luminus website so I guess you’re referring to that 2016 SBT-90 data? Yes, that emitter was very inefficient…
CFT-90 appeared a couple of years ago. It has superb thermals but is also quite inefficient. SBT90.2 is younger by about 2 years. It is possible that they have a new, better die that wins with CFT-90 despite having inferior thermals.
But maybe they have the same die and CFT-90 is indeed better but different folks measuring different LEDs cause confusion.
Or maybe the truth is yet different. I don’t know.
Good points all.
The 90.2 in a light has been quoted at 5000 lumens with 27-28A power draw. I know my CFT-90 does that at 2A less. Unknown to me if the difference is in the driver or the emitter, reflector or lens. Or some of all those things. I do have a UCLp lens over mine.
Time will tell, I’m sure. And when I find one that I can buy it is very likely I will have the 90.2 in something… just a matter of time.
Best damn point for not getting Luminous chip, almost shelled out to buy one.
At what voltage 70.2 are being driven at 8A?
If it’s the 12v configuration then these parts are more or less equal in terms of performance, with 70.2 edging out in terms of being more widely available not needing as big wires and 90.2 for being able to run at 3-ish volt (so you can use many drivers in a pinch). 90.2 would performs marginally better still (that would mean 70.2 are to be driven at 32 amps in 3V setup to achieve that).
If the 70.2 in question is at 6v config then… yikes. 90.2 would then be severely outmatched.
Another point to stay away for 90.2 is the fact that you need a huge wire to push 30A through it. I don’t think it’s fun to run a 10-guage wire inside the flashlight.
Which led do you mean? CFT90 or SBT90.2?