hello
total noob here 
I have a small led diving light im playing whit, upgrading the led:)
it has a 1 mode nanjg 111 1050ma driver 3.6v.
it was born whit a xr-e 7090 led.
right now i have a xml2 emitter in it, but thinking if xhp50.3 hi would deliver more lumens whit the setup.
I have also ordered a new 1400ma driver to maybe burst it
any good suggestions is welcome
Be sure to get the 3V version of the XHP50.3 HI, otherwise it won’t work. The SFT40 LED is also a good choice.
First up, you’ll need a new mcpcb. The xm-l2 is a 3535 footprint. While the XHP50.3 HI is a 5050 footprint and is too big to fit your current mcpcb. Measure your current mcpcb diameter in MM. You can usually purchase the LED already reflowed onto a board. Hopefully you can find one the right size.
Second up, make sure you get the correct LED. XM-L2 uses only 3 volts. XHP50.3 HI can be bought in 3v. However, it’s typically 6v and wouldn’t work with your current driver. So pay attention to that.
thanks I bought the xml-2 on a 16mm mcpcb and it was a 5050 foodprint. it works great, I was just thinking if I could get something even better
You’re right. It is a 5050. My bad.
But yeah, definitely make sure you have the correct voltage.
If you use this for diving and the LED has thermal contact to the outside of the case eg. watercooling, you can go much, much higher than 1.4A.
You can get drivers and LEDs on Copper-PCBs cheap from Convoys own store: https://convoylight.com/
If you want your light to have a bit of a narrower beam, the Cree “Hi” Models or the SFT40 instead of the SST40 would be your choice. They do not have the dome on top which gives a more focussed beam.
It is a delrin case so no direkt contact to the water…
Everything is sold out at convoy do you know any other good places to buy?
Thanks
They have marked basically everything as sold out because they are in vacation for 3 weeks and they seemingly don’t want to have a giant pile of orders after that.
If you can wait 3 weeks, Convoy is (as far as I know) the best and cheapest source for high quality flashlight parts out there.
I mean, a copper MCPCB with DTP costs $0,50 - if you buy the same from intl-outdoor, it’ll cost you $3,68.
What LED do you want to buy then?
Was looking at the sst40 on a 16mm board. I’m also on a hunt for a 1mode 17mm driver
Convoy only has one single mode driver:
This one is 1750mA, but if you are able to remove one of the 7135, you get 1400mA
Or 1400mA with at least 2 modes:
SST40:
Under water I would go with 6500K
More 7135s the more output. I’m not sure how much output you’re aiming for. A well-driven SST40 can easily take 6 amps, which is 17x7135 chips, obviously infeasible. There are FET and buck drivers that can deliver this level of current.
If you’re aiming for not a lot of output, you need to get a high CRI warm emitter, which is a huge improvement in visibility under water. Look into SFT40 3000K.
BTW: even if you want a lot of output, SST40 is still a bad emitter to use–it is made obsolete by other emitters currently available. If you want more throw, the SFT40 is strictly better. If you want more flood, 3V XHP50.3 HI is better.
Thanks for the help.
I’m only worried about the heat generated inside the delrin cylinder as it is not a metal torch… that why I’m thinking about leaving it on a not too high current.
A modern LED will generate less heat and are much more robust than the original Cree XR-E , but going from 1050mA to 1400mA might make things quite toasty. I would keep it at 1050mA just to be safe.
I do have a few spares a wanna try whit 1400ma then I can see how hot I gets… it’s not a primary light just a little fun backup
I see! Sorry I missed that part; yeah it makes sense to keep the current low. 1400mA should be survivable, but 1050mA is definitely a safer option. Given the low output, I’d recommend a warm throwy emitter like SFT40 3000K. A cold diving light just makes everything look blue.
That particular driver has no MCU and thus no LVP(Low Voltage Protection)
Any of the Convoy 12group drivers can be set to group 12 which is 1 mode(100% only).
Is it possible to get a aftermarket reflector for the sft40 that’s 19mm in dia and 14mm high?
Thanks
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