Well, recently i have found Those bicycle headlights , and i wanted to use them on my motocycle, unfortunately driver dave up after few days, it seems it it cant stand the 14v properly
And they are good for the money, beam pattern is very close to c8!
The driver itself is this one
Can it be modded to work properly at 14v?
Or if it cant, is there anything suitable for my needs, that can drive XML emitter at 1.2-1.5 amp and 14v?
LD 4B from mtnelectronics drives at 2.4A high. Up to 16V in. Others will chime in with more suggestions. Cheap, adjustable buck drivers available from bsnggood for eg. Can’t remember output current…
Do you care about the interface? Many drivers will not have the momentary pushbutton on the back.
Also can you tell the model number of the driver? (HX-xxxxx)
HX-1182A3
Nope, actualy they will be led by an on/off switch, so i prefer 1 mode only, 1.5amps tops, thats the max the lamp body can hold considering the thermal management
The default PCbs are green with somekind of a part number not HX …, those black one that i linked are HX hx-1182a3
I have found that The strobe on the other hand is quite handy for a motocycle, car drivers see the blinking
But actualy those banggood converters are tiny and can do the job, the output cuttent wont fluctuate alot i presume
These drivers will run up to 1.5 Amp with a sense resistor adjustment:
I = .25/R
http://www.fasttech.com/p/1105800
The diode is SS24.
The BG converters are CV, you want CC.
(Constant Voltage vs Constant Current)
Ture, but via CV you can actualy control hte current in some point, i have the bigger Ebay version of those, and did that in my fathers tractor, he has now powerful four CXA 1507 based led lights 
I actualy have those in my stuff somewhere…. how do you think, are they reliable on a long term run?
I have tested them out to 16 volts on the bench, but in use I run them in many desk lights, lanterns, with 5-6 Volt power supplies, 4AA cell, etc. Quite a few hours like this without any failures. But no long term at 14 volts. You have them already, why not see how they hold up?
I thought about using them at 12 volt with 2X LED in series.
They run about 80-85% efficient and so cheap I always keep some in the parts bin.
Definitive test here, but only to 8.4Volt.
http://lygte-info.dk/review/DriverTest%20Anti-reverse%20Driver%20Board%20AX2002%20UK.html
I just did two of these lights for my friend’s BMW (pathetic charging system on the old boxers).
I started with these drivers. I got rid of the contact plate and swapped the battery input and LED output wires to the opposite sides for better fit, and potted them in the hosts.
I replaced the power supply wire harness with 18ga silicone wire run through a small slit in the original switch boot.
I used 5C1 XM-L2s on Noctigons and added these lenses.
Just under 3.0a to the emitter @ 13V. Running the lights on the bench without any airflow they both kick off after about 13 minutes with the housing at about 170F. With a very small fan in front of them the housing drops to 110-130F and ran for over an hour without a glitch.
My buddy will be installing the lights over the winter, I have some doubts about the durability of the drivers and the weather resistance of the housing but no big expense so no big deal if they fail. Just another learning experience.
Stock light on the right, everything but the new lens on the left.
Completed light.
Good luck!
n/m - was same driver in previous post