Sold/Expired Help :Seeking a custom LED (5) X R2 in (2) X 26650 format

Hello All,

Im seeking someone to build a (5) X R2 light in a (2) X 26650 "C" format. I'm needing to replace my AW "C" cell ROP HOLA lights as my AW cells slowly die. I will purchase a cut down and borded M@G "C" body ready for the 26650 cells. Im a Cop only desire (1) level of output....on and off....nothing fancy.....Just a kick-*** duty light. I would prefer to run it regulated and seek a 60 - 90 minute runtime..... Hope this is possible....

I really need help and do not know who to contact to inquire about such a project.

I hope CPF can come through for me again.

Thanks much in advance,
PAUL

Re: Help Needed: Seeking a custom LED in (2) X 26650 format

I just finished a triple P7 4D Mag build for a customer in the military.

What heatsink do you plan on using? I would use Der Witchels.

Also, I recommend using 4 26500 cells if you want a practical runtime.

Re: Help Needed: Seeking a custom LED in (2) X 26650 format

EvilPaul2112 said:

Hello All,

Im seeking someone to build a triple SST-50 light in a (2) X 26650 "C" format. I LOVE the SST-50 Led. I'm needing to replace my AW "C" cell ROP HOLA lights as my AW cells slowly die. I will purchase a cut down and borded M@G "C" body ready for the 26650 cells. Im a Cop only desire (1) level of output....on and off....nothing fancy.....Just a kick-*** duty light. I would prefer to run it regulated and seek a 60 - 90 minute runtime..... Hope this is possible....

I really need help and do not know who to contact to inquire about such a project.

I hope CPF can come through for me again.

Thanks much in advance,
PAUL

Click to expand...

I don't think there's a driver for triple 5 Amp with 2xLi-ion. To
drive it to 2.8A wouldn't be any better than triple P7.
George has a new driver that can drive 3x5A, but need more Volt than 2 Li-ions to drive triple.

Closest options I can think off:

A. Triple SST-50 on 3C with 3xIMR 26500 DD.
B. 2C with 2x26650 but drive a Single SST-90,
need to wait for 10A CC driver to come out.

Re: Help Needed: Seeking a custom LED in (2) X 26650 format

Replies sent....Thanks

bump for help

One of the China based sellers have a board that will supply
5 x 800mA to 5 emitters, but it is multi mode ..... with an annoying
strobe mode.
The consideration with 5 emitters, is finding a reflector or optic
that is small enough to sit in a Mag head. 5 x McR17XR reflectors
will sit in a Mag head.
If you had 4 x R2 emitters, you could use McR19XR reflectors
If you had 3 x R2 emitters, the above seller have 21mm reflectors
that will fit in a Mag head.

If you are looking for :devil: output, then use a Maxflex board, the latest
versions can push the emitters at 1300mA each

A very nice build posted by member Hill uses 4 x XPG emitters.
A cheap 7135 based board is used to drive each emitter at
1400mA each. These boards can be purchased with multi modes
or a single output.

You can read about it here

https://www.candlepowerforums.com/threads/274025

Hi Paul,

It sounds like such a reasonable request, doesn't it? The availability of the C size Li Ion was an incredible enabler of moderate size power lights. I had a similar experience with the loss of the protected R CR2 size, only that was a whole product line.

Do you have a sense of what kind of beam you are hoping to have? I guess more specifically, have you seen a 5x LED beam in person or on the forum that you would like duplicated? If you can determine this, it will save one heck of a lot of time for the builder.

Don't get too hung up on it having to be the R2, as there is more than one way to approach a project.

I am assuming you are looking for a fairly good thrower with the replacement goals stated.

Hi, I ran a bit of math on your configuration just to see what is physically possible.

Input from 2 cells (from this graph from the A123 company)

http://www.a123systems.com/cms/product/pdf/1/_ANR26650M1A.pdf

2 x 3 volts x 2 AH = 12 watt hours of capacity


Power needed for 5x R2 power LEDs driven at 1 amp

5 x 3.5 volts x 1 amp = 17.5 watts

Driver and system losses - about 20%

Total = around 22 watts needed for the light.

12 watts / 22 watt hours = maybe 30 - 35 minutes.

If you go to 4 x leds instead

4 x 3.5 x 1 amp = 14 watts, plus say 2 watts of system losses = 16 watts

12 watt hours / 16 watts = 45 - 50 minutes


4X very carefully selected LEDs with low Vf and a very low loss system.

4 x 3 volts x 900 ma + loss = 12 watts

Will run for 1 hour.


Could you consider a 3 cell format?

Take care,

Harry

Thanks for all the replies. I build and mod my own ROPs and M@G85s, but dont know too much about LEDS.

Ive modded all my own swithes and installed customized Download "C" heatsinks on my lights. Along with a few tricks here and there I mod a pretty mean, efficient incan flashlight. So I guess Im seeking a multi-LED light to replace them. I want a combo of throw and spill, leaning more towards throw. Im not really looking for the brightest flashlight ever, but a very bright light with good runtime.

FYI, I plan on using IMR 26650 4000mAH batteries.

That cell selection will help.

I guess if it were me, I would be tempted to cut down an SL-20x body to a 2x or 3x imr and go from there. It would be easy to sleeve the body down to an IMR size and probably cheaper than having a C body mag bored out.

I prefer "C" M@Gs because I use all custom tailswitches on my lights and the "D" tubes are too much to hold onto when shooting.

Didn't you start out asking 3xSST 50?

5xR2 is easy, DX drop in.

Hi EvilPaul,

I have built a light with the specs you are talking about. The one I built was in a 2 D, but it did run on 7.4V. Also the one I built was multi mode, but I have a batch of single mode drivers coming that I could probly use to build a driver that will give about 1.1-1.2A per emitter.

Here is what mine looked like.



The beam was a long throw and had a fairly large hot spot. I would say it still out through a P7 had a smoother beam for sure, and had bright spill.

This shot is running @ 800ma per die.



I am not 100% sure the drivers I have coming will fit in a C mag, but I think they will. If you dont find another solution in the mean time, we could work something out.